White Chocolate Matcha Mousse Cake

We've blended the ancient calm of Japanese tea ceremonies with the airiness of modern French patisserie. Matcha (finely ground green tea) provides not just color but an elegant, slightly grassy umami flavor, softened by the sweetness of cream and white chocolate. It's not a heavy cake, but a refreshing mousse experience.
🕒 Prep Time 30 mins
Total Time 4 hrs 30 mins
🍽️ Servings 8 servings
🔥 Calories 310 kcal
🌍 Cuisine Japanese-French Fusion

Ingredients

Equipment Needed

  • 8-9 inch Springform Pan
  • Hand Mixer or Whisk
  • Sieve

Allergen Information

⚠️ Milk
⚠️ Wheat
⚠️ Egg

Instructions

1

Sprinkle the gelatin over the cold water and let it bloom for 5 minutes.

Tip: Blooming allows the gelatin to hydrate so it melts smoothly later.
2

Gently warm the bloomed gelatin over low heat or in the microwave just until liquid. Do not boil!

Tip: Boiling destroys gelatin's setting power.
3

Let the gelatin cool to lukewarm.

Tip: Pouring it hot into cream will curdle the fat and deflate the foam.
4

Begin whipping the cold cream with the powdered sugar. As it thickens, sift in the matcha powder.

Tip: Matcha tends to clump due to humidity; sifting ensures an even green color.
5

Whip to soft peaks. Do not overwhip!

Tip: Overwhipped cream makes folding in gelatin difficult. Soft peaks yield a creamier mousse.
6

While mixing gently, drizzle the lukewarm gelatin into the matcha cream.

Tip: Temper the gelatin by mixing a spoonful of cream into it first to avoid thermal shock.
7

Place the sponge layer in the pan. Pour the mousse over it and smooth the top.

Tip: Tap the pan gently on the counter to release air bubbles.
8

Refrigerate for at least 4 hours (or overnight) to set.

Tip: Gelatin needs time to form a stable network.
9

Unmold carefully and top with white chocolate shavings.

Tip: Use a hair dryer briefly on the outside of the metal ring to help release the cake.

Recipe FAQ

Why is the gelatin lumpy?
You likely added warm gelatin to very cold cream or didn't whisk fast enough (thermal shock).
Can I use regular green tea?
No. Matcha powder is unique; regular tea leaves won't provide the same flavor or texture.

Ingredients

  • 1 pc Sponge Cake Layer (trimmed to fit pan)
  • 2-3 tsp Premium Matcha Powder
  • 1 1/4 cups Cold Heavy Cream (min. 30%)
  • 3/4 cup Powdered Sugar
  • 1.5 packets Unflavored Gelatin (approx. 4 tsp)
  • 1/4 cup Cold Water
  • 2 oz White Chocolate Shavings