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Vietnamese coffee mousse cake with a glossy coffee glaze, featuring a smooth tan mousse layer over a thin chocolate coffee cake base, with a clean slice removed on a white plate
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Vietnamese Coffee Mousse Cake (Creamy Condensed Milk Coffee Dessert)

A rich and creamy Vietnamese coffee mousse cake with a soft chocolate coffee base, sweetened condensed milk soak, silky coffee mousse, and a glossy coffee topping. This make-ahead dessert is smooth, bold, and perfectly balanced.
Course Dessert
Cuisine Fusion Dessert, Vietnamese-Inspired
Keyword chocolate coffee cake, coffee dessert recipe, coffee lover dessert, coffee mousse cake, condensed milk cake, espresso mousse cake, layered mousse cake, make ahead dessert, mousse cake recipe, no bake mousse cake, vietnamese coffee dessert, vietnamese coffee mousse cake
Prep Time 40 minutes
Cook Time 18 minutes
Chill time 6 hours
Total Time 6 hours 58 minutes
Servings 10 servings
Calories 425kcal
Cost $14 for entire recipe

Equipment

  • 8-inch springform pan
  • Parchment paper
  • Mixing bowls
  • Hand mixer or stand mixer
  • Whisk
  • Rubber spatula
  • small saucepan or microwave-safe bowl
  • Measuring cups and spoons
  • offset spatula (for smoothing layers)
  • fine mesh sieve (optional, for cocoa garnish)
  • Knife for slicing
  • cake turntable (optional, for cleaner assembly)

Ingredients

Chocolate Coffee Cake Base

  • 3/4 cup all-purpose flour
  • 1/4 cup unsweetened cocoa powder
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/2 cup granulated sugar
  • 1 large egg
  • 1/3 cup whole milk
  • 1/4 cup vegetable oil
  • 2 tablespoons sour cream or Greek yogurt
  • 1 teaspoon vanilla extract
  • 3 tablespoons strong brewed coffee

Condensed Milk Coffee Soak

  • 3 tablespoons strong brewed coffee
  • 2 tablespoons sweetened condensed milk
  • 1 tablespoon water
  • 1 teaspoon granulated sugar
  • pinch of salt

Vietnamese Coffee Mousse

  • 2 1/4 teaspoons powdered gelatin
  • 3 tablespoons cold water
  • 2/3 cup strong brewed coffee
  • 1/2 teaspoon instant espresso powder
  • 3/4 cup sweetened condensed milk
  • 2 ounces cream cheese softened
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt
  • 1 3/4 cups heavy cream very cold

Glossy Coffee Topping

  • 1/2 cup strong brewed coffee
  • 2 tablespoons sweetened condensed milk
  • 1 teaspoon powdered gelatin
  • 1 tablespoon cold water

Optional Garnish

  • whipped cream
  • cocoa powder
  • chocolate curls
  • chocolate-covered espresso beans

Instructions

Make the Chocolate Coffee Cake Base

  • Preheat oven to 350°F. Line an 8-inch springform pan with parchment paper.
  • In a bowl, whisk together flour, cocoa powder, baking powder, baking soda, salt, and sugar.
  • In another bowl, whisk egg, milk, oil, sour cream, vanilla, and coffee until smooth.
  • Combine wet and dry ingredients and mix just until smooth. Do not overmix.
  • Pour into pan and bake for 16–18 minutes, or until a toothpick comes out with a few moist crumbs.
  • Cool completely.

Prepare the Coffee Soak

  • In a small bowl, mix coffee, condensed milk, water, sugar, and salt.
  • Warm slightly so it absorbs better.
  • Brush over the cooled cake in 2–3 passes, letting it soak in between each layer.

Bloom the Gelatin

  • Sprinkle gelatin over cold water and let sit for 5 minutes.
  • Microwave for about 10 seconds until melted. Do not boil.

Make the Coffee Mousse Base

  • In a small saucepan, gently warm coffee, espresso powder, and condensed milk until just warm.
  • Whisk in the melted gelatin until smooth.
  • Whisk in about 1 tablespoon of the cream cheese until fully blended.
  • Let mixture cool to room temperature.

Finish the Mousse

  • In a large bowl, beat remaining cream cheese until smooth.
  • Slowly add the cooled coffee mixture while mixing.
  • In another bowl, whip heavy cream to medium peaks.
  • Fold whipped cream into the coffee mixture in 3 additions until smooth and airy.

Assemble the Cake

  • Pour mousse over the soaked cake base and smooth the top.
  • Refrigerate for at least 5–6 hours or overnight until fully set.

Make the Coffee Topping

  • Bloom gelatin in cold water for 5 minutes.
  • Heat coffee and condensed milk until warm, then stir in gelatin.
  • Cool to room temperature until slightly thickened but still pourable.
  • Pour over mousse layer.
  • Chill for 1–2 hours until set.

Slice and Serve

  • Run a knife around the edges and release the pan.
  • Slice with a warm knife, wiping between cuts.
  • Garnish as desired.

Notes

Use Strong Vietnamese-Style Coffee

For the best flavor, use very strong brewed coffee or espresso. Vietnamese coffee is bold and intense, so weak coffee will make the mousse taste flat. If needed, stir in a small amount of instant espresso powder to boost the depth.

Balance the Sweetness

Sweetened condensed milk adds signature richness, but it can easily overpower the coffee. A small pinch of salt and properly strong coffee help keep the flavor balanced instead of overly sweet.

Do Not Overbake the Cake Base

The cake layer should stay soft since it will be chilled. Overbaking can lead to a dry or firm base after refrigeration, so remove it when a toothpick has just a few moist crumbs.

Soak in Layers for Best Texture

Apply the coffee soak in 2–3 passes, allowing it to absorb between each layer. This prevents soggy spots and ensures the cake stays evenly moist throughout.

Proper Gelatin Handling is Key

Always bloom gelatin in cold water first, then melt it gently. For the smoothest mousse, mix the gelatin into a warm, not hot, coffee mixture before combining with the rest of the ingredients.

Let the Mousse Base Cool Before Folding

If the coffee mixture is too warm, it can melt the whipped cream and affect the texture. It should be room temperature and still fluid, not hot or starting to set.

Whip Cream to Medium Peaks

Medium peaks create a mousse that is light, smooth, and sliceable. Overwhipped cream can make the mousse dense, while underwhipped cream may leave it too soft.

Chill Time Matters

This cake needs at least 5–6 hours to fully set, but overnight chilling gives the best results. Proper chilling ensures clean slices and a stable mousse.

Clean Slices Every Time

Use a warm knife and wipe it between cuts to get neat, bakery-style slices with clean layers.

Make Ahead Friendly

This Vietnamese coffee mousse cake can be made 1–2 days in advance, making it a great option for entertaining or planning ahead.

Storage Tips

Store leftovers in an airtight container in the refrigerator for up to 3 days. The texture stays smooth and creamy, and the coffee flavor deepens slightly over time.