Ingredients:
- Cupcakes:
- 7 ounces cake flour (about 1 3/4 cups)
- 1/2 teaspoon salt
- 1/2 teaspoon baking soda
- 1/2 teaspoon baking powder
- 1/2 cup unsweetened cocoa
- 1/2 cup butter, softened
- 1 1/2 cups sugar
- 2 large egg yolks
- 1/2 teaspoon vanilla extract
- 1 cup whole buttermilk
- 2 ounces unsweetened baking chocolate
- 3 large egg whites
- 1/4 teaspoon cream of tartar
- Baking spray with flour
- Frosting:
- 1 1/3 cups sugar
- 1/3 cup water
- 1/2 vanilla bean
- 3 large egg whites
- 1/4 teaspoon cream of tartar
- 1/8 teaspoon salt
- 1/4 cup unsweetened cocoa
- 1 ounce bittersweet chocolate