Ingredients:
- Cake:
- Cooking spray
- 3/4 cup sugar, divided
- 1/2 cup water
- 2 tablespoons unsalted butter, melted and cooled
- 3 large egg yolks
- 2 ounces (about 1/2 cup) cake flour
- 1/3 cup unsweetened cocoa
- Dash of salt
- 3 large egg whites
- Sauce:
- 1/4 cup water
- 2 tablespoons sugar
- 2 tablespoons unsweetened cocoa
- 1 tablespoon unsalted butter
- 1/2 teaspoon cake flour
- Topping:
- 2 large egg whites
- 2 tablespoons sugar
- Mint leaves (optional)