These pastel-studded blondies are a celebration of fun baking and nostalgic sweetness. With soft pink and blue color baked right into the batter and fluffy marshmallows tucked inside, each bar delivers a chewy, buttery bite with a playful cotton candy twist. Perfect for birthday tables, bake sales, or whenever you want a dessert that looks as magical as it tastes, these blondies bring carnival vibes straight to your kitchen.
🍬 Cotton Candy Marshmallow Blondies
Equipment
- 8×8 inch baking pan
- Parchment paper
- Mixing bowls
- Whisk
- Rubber spatula
- measuring cups
- Measuring spoons
- Knife or skewer (for swirling batter)
Ingredients
Blondie Base
- ¾ cup 150 g light brown sugar, packed
- ¼ cup 50 g granulated sugar
- ½ cup 113 g unsalted butter, melted & cooled
- 1 large egg + 1 egg yolk room temperature
- 1½ tsp cotton candy extract
- 1 tsp vanilla extract
- 1 cup 125 g all-purpose flour
- ½ tsp baking powder
- ¼ tsp fine salt
Mix-Ins & Swirl
- 1½ cups mini marshmallows
- Pink & blue gel food coloring optional
- ½ cup cotton candy–flavored baking chips or white chocolate chips optional
Instructions
- Prep: Preheat oven to 350°F (175°C). Line an 8×8-inch pan with parchment, leaving overhang.
- Mix sugars & butter: Whisk melted butter with brown and granulated sugars until smooth and glossy.
- Add eggs & flavor: Whisk in egg, yolk, cotton candy extract, and vanilla until fully combined.
- Dry ingredients: Fold in flour, baking powder, and salt just until no dry streaks remain.
- Color (optional): Divide batter in half. Tint one pink and one blue.
- Layer & swirl: Spoon alternating dollops of pink and blue batter into pan. Lightly swirl with a knife.
- Top it off: Sprinkle marshmallows and chips evenly over the top; gently press in.
- Bake: 22–26 minutes, until edges are set and center looks just barely underbaked.
- Cool: Let cool completely before slicing for clean cuts.
Notes
- Cotton candy extract strength varies by brand. If yours is very concentrated, start with 1 teaspoon and increase slightly in the next batch if needed.
- Do not overbake. The center should look slightly underdone when removed from the oven; it will finish setting as it cools and stay chewy instead of cakey.
- Marshmallow placement matters. Press marshmallows lightly into the batter so they melt into pockets instead of fully dissolving on top.
- For extra gooey tops, add a small handful of marshmallows during the last 5 minutes of baking.
- Color gently. Gel food coloring is best—liquid coloring can thin the batter and affect texture.
- Clean slices tip: Let blondies cool completely, then wipe your knife between cuts for neat edges.
- Storage: Keep in an airtight container at room temperature for up to 2 days or refrigerate up to 5 days. Bring to room temperature before serving for best texture.
- Freezing: Blondies freeze well for up to 2 months; wrap individually to prevent marshmallow sticking.
FAQ
Can I make these without food coloring?
Yes. The blondies will still have the cotton candy flavor and marshmallow texture; they’ll just bake up a natural golden color instead of pastel.
What type of marshmallows work best inside the batter?
Mini marshmallows are ideal because they distribute evenly and create smaller gooey pockets throughout the blondies.
Can I double this recipe?
Absolutely. Double all ingredients and bake in a 9×13-inch pan, adding 5–10 minutes to the baking time as needed.
Do these taste very sweet?
They’re sweet but balanced. The buttery blondie base keeps them from tasting overly sugary despite the cotton candy flavor.
Can I make them ahead of time for an event?
Yes. These blondies actually taste even better the next day once the flavors settle and the texture fully sets.
Can I add other mix-ins?
You can add white chocolate chips or pastel sprinkles, but keep additions light so the marshmallows remain the star of the blondies.
💗 More Whimsical Desserts to Try
If you love fun, colorful bakes like these cotton candy marshmallow blondies, you might also enjoy:
- Pink Lemonade Cupcakes – sweet, tangy, and pastel-perfect
https://sugarcloudbaking.com/2026/01/04/pink-lemonade-cupcakes/ - Cotton Candy Cake Recipe – a fluffy, nostalgic classic
https://sugarcloudbaking.com/2025/12/03/cotton-candy-cake-recipe/ - Candy Corn Cupcakes – playful colors with a soft vanilla base
https://sugarcloudbaking.com/2026/01/06/candy-corn-cupcakes/ - Green Apple Vanilla Bean Cupcakes – bright flavor with a whimsical twist
https://sugarcloudbaking.com/2026/01/05/green-apple-vanilla-bean-cupcakes/
These recipes pair beautifully with cotton candy–inspired treats and keep the fun, pastel carnival vibe going on your dessert table ✨
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