Ingredients
4 oz semisweet chocolate
1 2/3 cups cake flour
1 cup sugar
1/2 cup light brown sugar
1 teaspoon each baking soda and salt
1/4 cup unsweetened cocoa powder
1/3 cup softened butter
1 cup sour cream
2 eggs
1 teaspoon vanilla
1/4 cup strong coffee
Frosting
5 tablespoons unsalted butter
1 1/2 cups semisweet chocolate chips
3/4 cup heavy cream
3 cups confectioners’ sugar
Cake
1. Preheat oven to 350 F.
2. Butter two 9″ cake pans, line the bottoms with waxed paper, and dust the sides with flour.
3. Melt chocolate in heavy saucepan over low heat.
4. Sift together flour, sugars, baking soda, salt, and cocoa in a large bowl. Add butter and sour cream and beat with a hand mixer for 3 minutes, scraping sides with a spatula. Add melted chocolate, eggs, vanilla, and coffee. Beat 3 more minutes.
5. Pour batter into pans. Bake 30 minutes, or until cakes spring back when touched. Cool cakes 10 minutes, then remove from pans and finish cooling on racks.
Frosting
1. Melt butter and chocolate in a heavy saucepan. Whisk in cream and sugar until smooth.
2. Spread 1/4 of icing onto surface of one cake layer. Set second layer on top. Pour on remianing icing, spreading over top and sides with a spatula. Serve with vanilla ice cream.