Mini Chocolate Layer Cakes

Occasion: My best friend is home and I wanted to try a mini “naked” cake. Recipe: America’s Test Kitchen Ingredients: 1.5 ounces unsweetened chocolate, chopped 3 tablespoons unsweetened cocoa powder 1/4 teaspoon instant espresso powder or instant coffee powder 1/2 cup boiling water 1/4 sour cream, room temperature 1/4 teaspoon vanilla extract 1/2 cup all-purpose…