For the Cake:
- 90 g Classic White Chocolate, chopped
- 1 1/4 cups flour
- 3/4 cup sugar
- 1/2 tsp salt
- 1/4 tsp baking soda
- 75 ml buttermilk
- 1/4 cup butter, softened
- 4 large egg whites
- 1 tsp vanilla
For the Frosting:
- 110 g Classic White Chocolate, chopped
- 1/2 cup cream cheese, softened
- 1/2 cup butter, softened
- 1 tsp vanilla
For the Topping:
- Preheat oven to 350°F.
- Coat a 6-inch cake pan with non-stick cooking spray and lightly flour.
- Line bottom of pan with parchment paper, then spray and flour again.
- In heatproof bowl, melt 90 g of the white chocolate in microwave in 15-second bursts. Stir between each until chocolate is completely melted.
- In large bowl, combine flour, sugar, salt, baking soda, buttermilk and butter.
- Mix on low speed with electric mixer until all dry ingredients are completely moistened.
- Stir in melted chocolate.
- In separate bowl, beat egg whites until stiff peaks form.
- Gently fold batter into egg whites.
- Spread evenly in cake pan. Tap on counter to remove any air bubbles.
- Bake for 20 to 30 minutes or until toothpick inserted into the batter comes out clean.
- Chill cake in refrigerator.
- Melt remaining 110 g of white chocolate until completely melted.
- Beat softened cream cheese in large bowl until smooth, then gradually add in melted white chocolate.
- Add butter and vanilla and blend thoroughly until smooth.
- Frost the cake and decorate with dark chocolate shavings.