Courtesy of the Incomparable Martha Stewart...
Recipe for One Bowl Chocolate Cupcakes:
Makes 18 to 24
3/4 cup unsweetened cocoa powder
1 1/2 cups all-purpose flour
1 1/2 cups sugar
1 1/2 teaspoons baking soda
3/4 teaspoon baking powder
3/4 teaspoon salt
2 large eggs
3/4 cup warm water
3/4 cup buttermilk
3 tablespoons safflower oil
1 teaspoon pure vanilla extract
1.Preheat oven to 350 degrees. Line standard muffin tins with paper liners; set aside. Sift together cocoa powder, flour, sugar, baking soda, baking powder, and salt into a large bowl. Add eggs, warm water, buttermilk, oil, and vanilla, and mix until smooth, about 3 minutes. Scrape down the sides and bottom of bowl to assure batter is well mixed.
2.Divide batter evenly among muffin cups, filling each 2/3 full. Bake until tops spring back when touched, about 20 minutes, rotating pan once if needed. Transfer to a wire rack; let cool completely.
Basic Buttercream Recipe:
Makes about 4 cups
12 ounces (3 sticks) unsalted butter, softened
1 pound confectioners' sugar, sifted
1/2 teaspoon pure vanilla extract
1.Beat butter with a mixer on medium-high speed until pale and creamy, about 2 minutes.
2.Reduce speed to medium. Add sugar, 1/2 cup at a time, beating after each addition, about 5 minutes. (After every 2 additions, increase speed to high, and beat for 10 seconds, then reduce speed to medium-high). Add vanilla, and beat until buttercream is smooth. Use immediately, or cover and refrigerate for up to 3 days. (Bring to room temperature, and beat on low speed until smooth before using.)