If you love rich, chocolatey cookies with that classic cookies-and-cream flavor, these Crumbl Oreo Mallow Sandwich Cookies are about to become your new obsession. Made with deep, dark cocoa cookie bases and a fluffy marshmallow cream filling, this copycat recipe nails the soft, bakery-style texture and bold Oreo-inspired taste.

Unlike traditional Oreos, these cookies are thick, ultra-soft, and completely indulgent—just like the ones from Crumbl. The smooth tops, no imprint, and perfectly whipped mallow filling make them look and taste like the real deal, but even better fresh from your own kitchen.

🍪 Why You’ll Love This Crumbl Chocolate Oreo Mallow Sandwich Cookies Recipe

If you love rich chocolate cookies, classic Oreo flavor, and fluffy marshmallow filling, these Crumbl Chocolate Oreo Mallow Sandwich Cookies are the ultimate bakery-style treat to make at home.

Thick, Soft, and Bakery-Style

These cookies bake up large, soft, and fudgy with that signature oversized Crumbl-style texture. The centers stay tender while the edges set just enough to hold all of that creamy Oreo marshmallow filling.

Loaded with Oreo Flavor

Crushed Oreo cookies in both the chocolate cookie dough and the filling give these sandwich cookies a bold cookies-and-cream flavor. A touch of black cocoa powder helps create that deep Oreo-inspired taste and color.

Fluffy Marshmallow Oreo Filling

The filling is light, creamy, and perfectly sweet with marshmallow fluff and crushed Oreos mixed right in. It adds the perfect soft, nostalgic center that makes these cookies feel extra indulgent.

Just Like a Gourmet Bakery Cookie

These sandwich cookies look and taste like a gourmet bakery dessert, but they are easy to make in your own kitchen. They are perfect for parties, holidays, or whenever you want a Crumbl-style treat at home.

Perfect for Oreo Lovers

If you are obsessed with cookies and cream desserts or rich chocolate cookies, this recipe delivers that indulgent Oreo flavor in every single bite.

🛒 Ingredient Notes for Crumbl Chocolate Oreo Mallow Sandwich Cookies

Using the right ingredients is the key to getting that thick, soft, bakery-style texture in these Crumbl Chocolate Oreo Mallow Sandwich Cookies. Each ingredient plays an important role in creating the rich chocolate cookie base and the fluffy Oreo marshmallow filling.

Unsalted Butter

Unsalted butter gives these cookies a rich, buttery flavor and helps create the soft, tender texture Crumbl-style cookies are known for. Make sure the butter is softened so it mixes smoothly into both the cookie dough and the filling.

Granulated Sugar, Brown Sugar, and Powdered Sugar

This combination of sugars helps create a cookie that is soft, thick, and flavorful. Granulated sugar adds sweetness, brown sugar adds moisture and chewiness, and a little powdered sugar helps give the cookies a softer texture.

Eggs

Eggs add structure, richness, and moisture to the chocolate Oreo cookie dough. They also help bind the ingredients together so the cookies bake up thick and sturdy enough for sandwiching with filling.

Vanilla Extract

Vanilla enhances both the chocolate cookie base and the marshmallow Oreo filling. Even though these are rich chocolate cookies, vanilla helps round out the flavor and makes the cookies taste more bakery-style and balanced.

All-Purpose Flour

All-purpose flour provides the structure needed for these oversized sandwich cookies. It helps the dough stay thick and prevents the cookies from spreading too much in the oven.

Cocoa Powder and Black Cocoa Powder

Cocoa powder gives the cookies deep chocolate flavor, while black cocoa powder adds that signature Oreo-style taste and dark color. If you want the cookies to taste even more like classic Oreo sandwich cookies, black cocoa powder makes a big difference.

Cornstarch

Cornstarch helps create a soft, tender texture in the cookies. It can also help keep the cookies thick and slightly fudgy, which works well for a bakery-style Oreo sandwich cookie.

Baking Soda and Baking Powder

These leavening agents help the cookies rise just enough while still staying thick and soft. They work together to create a tender crumb without making the cookies too cakey.

Salt

A little salt balances the sweetness in both the cookies and the filling. It also helps bring out the chocolate and Oreo flavors so the finished cookies do not taste overly sweet.

Oreo Cookies

Crushed Oreo cookies are the star ingredient in this recipe. They add cookies-and-cream flavor, texture, and that signature Oreo taste in both the cookie dough and the marshmallow filling. Finely crushed Oreos work best for even mixing and a smoother bite.

Marshmallow Fluff

Marshmallow fluff gives the filling its light, creamy, nostalgic flavor and soft texture. It helps create that classic mallow sandwich cookie center that makes these cookies so irresistible.

Heavy Cream

Heavy cream can be used to loosen the filling if needed, making it easier to spread or pipe. Add just a small amount at a time so the filling stays thick enough for sandwich cookies.

🍪 How to Make Crumbl Chocolate Oreo Mallow Sandwich Cookies

These Crumbl Chocolate Oreo Mallow Sandwich Cookies come together in a few simple steps and bake up thick, soft, and bakery-style. Follow these step-by-step instructions for the best texture and flavor.

Step 1: Preheat and Prepare

Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. This helps prevent sticking and ensures even baking.

Step 2: Cream Butter and Sugars

In a large mixing bowl, combine the softened butter, granulated sugar, brown sugar, and powdered sugar. Mix just until smooth and combined—do not overmix, as this helps keep the cookies thick and dense.

Step 3: Add Eggs and Vanilla

Add the eggs and vanilla extract to the mixture and mix until fully incorporated. The dough should look smooth and slightly creamy.

Step 4: Mix Dry Ingredients

In a separate bowl, whisk together the flour, cocoa powder, black cocoa powder, cornstarch, baking soda, baking powder, and salt. This ensures the ingredients are evenly distributed throughout the dough.

Step 5: Combine Wet and Dry Ingredients

Gradually add the dry ingredients into the wet mixture. Mix until a thick, soft cookie dough forms. Be careful not to overmix to keep the cookies tender.

Step 6: Fold in Crushed Oreos

Gently fold in the finely crushed Oreo cookies until evenly distributed throughout the dough. This adds that classic cookies-and-cream flavor.

Step 7: Shape the Cookies

Scoop large portions of dough (about ¼ cup each), roll into smooth balls, and flatten slightly into thick discs. Keep the tops smooth with no imprint for a true Crumbl-style look.

Step 8: Bake

Bake for 10–12 minutes, until the edges are set but the centers still look slightly underbaked. This is key for achieving that soft, bakery-style texture.

Step 9: Cool Completely

Allow the cookies to cool completely on the baking sheet. This helps them set properly and prevents the filling from melting when assembled.

Step 10: Make the Marshmallow Oreo Filling

In a mixing bowl, beat the softened butter until smooth. Add the powdered sugar, marshmallow fluff, vanilla extract, and a small amount of heavy cream. Beat for several minutes until light and fluffy, then fold in crushed Oreos.

Step 11: Assemble the Sandwich Cookies

Spread or pipe a thick layer of filling onto the flat side of one cookie. Top with another cookie and gently press together to form a sandwich.

Step 12: Serve and Enjoy

Serve immediately or chill slightly for a firmer filling. These cookies are rich, soft, and packed with Oreo flavor in every bite.

💡 Pro Tips for the Best Crumbl Chocolate Oreo Mallow Sandwich Cookies

Follow these expert baking tips to get perfectly thick, soft, and bakery-style Crumbl Chocolate Oreo Mallow Sandwich Cookies every time. Small details make a big difference in achieving that signature Crumbl texture and flavor.

Do Not Overmix the Dough

Mix the butter and sugars just until combined, and stop mixing once the flour is incorporated. Overmixing can make the cookies dense and tough instead of soft and tender.

Use Black Cocoa Powder for Oreo Flavor

For the most authentic cookies-and-cream taste, use black cocoa powder along with regular cocoa powder. This gives the cookies their deep color and signature Oreo-style flavor.

Measure Flour Correctly

Too much flour will make the cookies dry and crumbly. Use the spoon-and-level method or a kitchen scale to ensure accurate measurements for the best texture.

Keep Cookies Thick When Shaping

Roll the dough into large balls and flatten slightly, but keep them thick. This helps create that signature Crumbl-style cookie that is soft in the center and sturdy enough for sandwiching.

Underbake Slightly for Soft Centers

Remove the cookies when the edges are set but the centers still look slightly underbaked. They will continue to set as they cool, giving you a soft and fudgy texture.

Let Cookies Cool Completely Before Filling

If the cookies are even slightly warm, the marshmallow Oreo filling can melt or slide. Allow them to cool fully before assembling for clean, bakery-style sandwiches.

Whip the Filling Until Light and Fluffy

Beat the marshmallow filling for several minutes to make it light and airy. This creates that signature creamy texture that balances the rich chocolate cookies.

Control Filling Consistency

If the filling is too thick, add a small amount of heavy cream. If it becomes too soft, chill it briefly before assembling. The goal is a thick, pipeable consistency that holds its shape.

Use Finely Crushed Oreos

Crush the Oreo cookies finely so they mix evenly into both the dough and the filling. Large chunks can make the cookies harder to shape and assemble.

Chill the Dough if Needed

If your dough feels too soft or sticky, chill it for 15–20 minutes before baking. This helps the cookies stay thick and prevents excessive spreading.

Store Properly for Best Texture

Store assembled cookies in the refrigerator, then bring them to room temperature before serving. This keeps the filling stable while maintaining a soft cookie texture.

🍫 Variations for Crumbl Chocolate Oreo Mallow Sandwich Cookies

These Crumbl Chocolate Oreo Mallow Sandwich Cookies are incredibly versatile and easy to customize. Try these delicious variations to switch up the flavor while keeping that thick, bakery-style texture.

Double Chocolate Oreo Sandwich Cookies

Add ½ cup of chocolate chips to the cookie dough for an extra rich, chocolate-loaded version. This makes the cookies even more indulgent and fudgy.

Golden Oreo Mallow Sandwich Cookies

Swap regular Oreos for Golden Oreos and replace the cocoa powder with additional flour. This creates a vanilla-based cookie with a cookies-and-cream marshmallow filling.

Mint Oreo Sandwich Cookies

Use Mint Oreos and add a small amount of peppermint extract to the filling. This gives the cookies a refreshing mint chocolate flavor that pairs perfectly with the rich cookie base.

Peanut Butter Oreo Sandwich Cookies

Add ¼ cup of creamy peanut butter to the filling for a chocolate peanut butter twist. You can also mix in peanut butter chips for even more flavor.

Cookies and Cream Explosion

Increase the amount of crushed Oreos in both the dough and the filling for a stronger cookies-and-cream flavor and more texture in every bite.

Fudge-Filled Oreo Sandwich Cookies

Replace part of the marshmallow filling with chocolate ganache or fudge frosting for an ultra-rich, dessert-style cookie.

Birthday Cake Oreo Sandwich Cookies

Use Birthday Cake Oreos and add a small handful of sprinkles to the filling for a fun, colorful variation that is perfect for celebrations.

Mini Oreo Sandwich Cookies

Use a smaller cookie scoop to make mini sandwich cookies. Reduce the baking time slightly for perfectly bite-sized treats.

Extra Thick Bakery-Style Version

For even thicker cookies, chill the dough for 30 minutes before baking. This helps create an ultra-thick, bakery-style cookie with minimal spreading.

Gluten-Free Option

Use a 1:1 gluten-free flour blend and gluten-free sandwich cookies to make a gluten-free version without sacrificing texture or flavor.

🧊 Storage and Make-Ahead Tips for Crumbl Chocolate Oreo Mallow Sandwich Cookies

Proper storage is key to keeping your Crumbl Chocolate Oreo Mallow Sandwich Cookies soft, fresh, and bakery-quality. Follow these tips to maintain the perfect texture and flavor whether you are storing leftovers or preparing ahead of time.

How to Store Assembled Cookies

Store assembled sandwich cookies in an airtight container in the refrigerator for up to 4–5 days. The marshmallow Oreo filling stays stable when chilled, while the cookies remain soft.

Bring to Room Temperature Before Serving

For the best texture, allow refrigerated cookies to sit at room temperature for 15–20 minutes before serving. This softens the cookies and makes the filling creamy again.

Storing Unfilled Cookies

If you want the freshest results, store the baked cookies and filling separately. Keep the cookies in an airtight container at room temperature for up to 3 days, and store the filling in the refrigerator. Assemble just before serving.

How to Freeze the Cookies

Unfilled cookies freeze very well. Place them in a freezer-safe container or bag and freeze for up to 2 months. Thaw at room temperature before filling and serving.

Freezing Assembled Sandwich Cookies

You can also freeze fully assembled cookies. Wrap each sandwich cookie individually and store in an airtight container for up to 1 month. Thaw in the refrigerator, then bring to room temperature before eating.

Make-Ahead Dough Option

The cookie dough can be made ahead and stored in the refrigerator for up to 48 hours. Scoop and shape the dough before chilling for easier baking later.

Freeze Cookie Dough Balls

Portion the dough into balls and freeze on a baking sheet, then transfer to a freezer bag. Bake directly from frozen, adding 1–2 extra minutes to the baking time.

Make the Filling Ahead

The marshmallow Oreo filling can be made up to 2–3 days in advance and stored in the refrigerator. Re-whip slightly before using to restore its light, fluffy texture.

Keep Cookies Soft Longer

To help maintain softness, store cookies in an airtight container and avoid overbaking. Proper storage ensures they stay thick, soft, and bakery-style for days.

❓ Frequently Asked Questions About Crumbl Chocolate Oreo Mallow Sandwich Cookies

If you are making Crumbl Chocolate Oreo Mallow Sandwich Cookies for the first time, these helpful answers will guide you through the most common questions so your cookies turn out thick, soft, and bakery-style.

Do these taste like the real Crumbl Oreo mallow sandwich cookies?

Yes, this copycat recipe is designed to recreate the thick, soft chocolate cookies and fluffy Oreo marshmallow filling that make Crumbl Oreo mallow sandwich cookies so popular. Using black cocoa powder and crushed Oreos helps give them that classic cookies-and-cream flavor.

Do I need black cocoa powder?

Black cocoa powder is highly recommended because it gives the cookies a darker color and a more authentic Oreo-style flavor. You can still make the recipe without it, but the cookies will taste more like a regular chocolate cookie than a true Oreo-inspired sandwich cookie.

Can I make these cookies without Oreos in the dough?

Yes, you can leave the crushed Oreos out of the dough if you prefer a smoother chocolate cookie base. However, including them adds extra cookies-and-cream flavor and makes the cookies more similar to the Crumbl-inspired version.

Why did my cookies spread too much?

Cookies usually spread too much if the butter was too warm, the dough was overmixed, or the dough needed chilling before baking. If your dough feels very soft, chill it for 15 to 20 minutes before baking to help the cookies stay thick.

Why are my cookies dry?

Dry cookies are usually caused by too much flour or overbaking. Be sure to measure the flour carefully and remove the cookies when the edges are set but the centers still look slightly soft.

Can I make the filling ahead of time?

Yes, the marshmallow Oreo filling can be made 2 to 3 days in advance and stored in the refrigerator. Before using, let it soften slightly and re-whip if needed so it becomes light and fluffy again.

Can I freeze these sandwich cookies?

Yes, both the cookies and the assembled sandwich cookies can be frozen. Unfilled cookies freeze especially well and can be thawed at room temperature before adding the filling.

Do I need to refrigerate the cookies?

Because of the marshmallow Oreo filling, it is best to store assembled cookies in the refrigerator. Let them sit at room temperature for a few minutes before serving for the best soft texture.

Can I make these smaller?

Yes, you can use a smaller cookie scoop to make mini Oreo mallow sandwich cookies. Just reduce the baking time slightly and keep an eye on them so they stay soft.

How do I get a more authentic Crumbl-style texture?

For the most authentic Crumbl-style result, keep the cookies thick, do not overmix the dough, use black cocoa powder, and slightly underbake them. Let the cookies cool completely before adding the filling so the sandwich cookies hold their shape.

🍪 More Desserts You’ll Love

If you love these Crumbl Chocolate Oreo Mallow Sandwich Cookies, here are more indulgent, bakery-style desserts from Sugar Cloud Baking that you should try next.

Crumbl Chocolate Cupcake Cookies – Rich chocolate cookies topped with smooth chocolate frosting and chocolate sprinkles for the ultimate chocolate lover’s treat.

Ferrero Rocher Cookies – Thick, chocolate hazelnut cookies inspired by the classic candy, filled with deep chocolate flavor and crunchy texture.

Twix Thumbprint Cookies – Buttery cookies filled with caramel and topped with chocolate for a perfect candy-inspired dessert.

Hazelnut Espresso Cookies – A rich, coffee-infused cookie with nutty depth and a bold bakery-style flavor.

Pistachio Latte Cookies – Soft cookies with a subtle pistachio flavor and coffee notes for a unique gourmet twist.