Ingredients

The following ingredients have 12 Servings
  • 1 1/2 cups flour
  • 3/4 cup unsweetened cocoa
  • 1 1/2 tsp baking powder
  • 1/2 tsp baking soda
  • 1/2 tsp salt
  • 1 cup sugar
  • 1/2 cup light brown sugar
  • 2 large eggs plus 1 egg yolk, at room temperature
  • 1/2 cup milk, at room temperature
  • 1/2 cup plain fat-free Greek yogurt, at room temperature
  • 1/2 cup vegetable or canola oil
  • 2 tsp vanilla extract
  • 2 tsp instant espresso
  • 1/2 cup boiling water
  • 4 oz semisweet chocolate, finely chopped
  • 1 cup unsalted butter, softened
  • 1/2 tsp salt
  • 3/4 cup unsweetened cocoa, sifted
  • 2 tsp vanilla extract
  • 2 1/2 cups powdered sugar
  • 5 Tbsp heavy cream

Instruction

  • Preheat oven to 350°F and spray two 8-inch round cake pans with nonstick spray.
  • Whisk together flour, cocoa, baking powder, baking soda, and salt in a large bowl; make a well in the center of the mixture. Add sugars, eggs, egg yolk, milk, yogurt, oil, and vanilla to flour mixture; whisk in just until incorporated. Dissolve instant espresso in boiling water; add to batter and whisk in just until smooth. Fold in chopped chocolate.
  • Divide batter evenly between cake pans and smooth with an offset spatula. Tap pans sharply to reduce air bubbles.
  • Bake for 28 to 30 minutes, until cakes spring back to the touch, a toothpick inserted in the center comes out with a few crumbs, and the edges are pulling slightly away from the pan. Cool cakes completely in pans on a wire rack.
  • For the frosting, beat butter and salt in a large mixer bowl on medium speed until combined. With the mixer on low speed, gradually add sifted cocoa, beating until incorporated. Mix in vanilla. Add powered sugar 1 cup at a time, alternating with 1 tablespoon of heavy cream. Scrape down the bowl as needed. Add remaining 2 tablespoons of heavy cream and mix on low speed until combined, then beat on medium speed for 1 minute, until light and airy.
  • To assemble, place one cake layer on a rotating cake stand. Use an offset spatula to spread about 1 cup frosting over the layer. Add second cake layer and spread about 1 cup frosting over the layer, swirling the frosting generously over the edge of the layer. Use the offset spatula to apply frosting to the sides of the cake while you rotate the cake stand, then use a bench scraper to gently smooth the edges of the cake.
  • Store leftover cake covered in the refrigerator; bring to room temperature before serving.