Chocolate Layer Cake with Buttercream (Print Version)

# Ingredients:

→ For the Chocolate Cake

01 - 1 cup (199g) granulated sugar
02 - 1 cup (213g) light brown sugar, packed
03 - 1 and 3/4 cups (210g) all-purpose flour
04 - 1 cup (84g) unsweetened cocoa powder
05 - 1 and 1/2 teaspoons baking soda
06 - 1 teaspoon baking powder
07 - 3/4 teaspoon salt
08 - 2 large eggs, room temperature
09 - 1 large egg yolk, room temperature
10 - 1 cup (227g) sour cream
11 - 1/4 cup (57ml) whole milk
12 - 1/2 cup (113ml) oil (canola, vegetable, or refined coconut)
13 - 1 Tablespoon vanilla extract
14 - 1 cup (227ml) freshly brewed coffee or boiled water

→ For the Chocolate Fudge Frosting

15 - 8 ounces semi-sweet or bittersweet chocolate, coarsely chopped
16 - 1 and 1/2 cups (340g) unsalted butter, room temperature
17 - 2 and 3/4 cups (426g) confectioner's sugar, sifted
18 - 2 teaspoons vanilla extract
19 - 1/4 teaspoon salt

# Instructions:

01 - Preheat oven to 350°F. Generously spray two 9-inch round baking pans with non-stick baking spray and set aside
02 - In a stand mixer with paddle attachment or large bowl with electric mixer, combine both sugars, flour, cocoa, baking soda, baking powder and salt on low until thoroughly combined
03 - In another large bowl, whisk together eggs, yolk, sour cream, milk, oil and vanilla until well combined
04 - Add wet ingredients into dry ingredients and beat on low until just incorporated. Carefully add hot coffee or water and beat until completely combined, about 1 minute. Batter will be thin
05 - Divide batter evenly between pans. Bake for 30-32 minutes, until toothpick inserted in center comes out clean or with few moist crumbs
06 - Cool cakes in pans on cooling rack for 10 minutes before removing and transferring to rack to cool completely
07 - Place chopped chocolate in heatproof bowl over barely simmering water. Heat, stirring frequently, until completely melted. Remove from heat and set aside to cool slightly
08 - Beat butter until creamy. Gradually add confectioner's sugar on low speed, one cup at a time, beating well after each addition
09 - Once all sugar is added, increase speed to medium-high and beat for 2 minutes. Beat in vanilla and melted chocolate until well combined and creamy
10 - Level cake tops with serrated knife. Place one layer on plate, spread thick layer of frosting on top, then add second layer. Frost top and sides of cake
11 - Decorate with chocolate chips, sprinkles, chocolate shavings as desired, or leave plain

# Notes:

01 - Store in refrigerator, loosely covered, for up to 2 days
02 - Coffee enhances chocolate flavor without adding coffee taste
03 - Room temperature ingredients blend better for a smoother batter