Java Cupcakes

Preheat oven to 350 degrees F. Line twenty-one 2 1/2-inch muffin cups with paper bake cups or coat with nonstick cooking spray; set aside. In a large bowl, combine flour, cocoa powder, espresso powder, baking powder, baking soda and salt.

In another large bowl, whisk together buttermilk, granulated sugar, oil, eggs and vanilla. Add buttermilk mixture to flour mixture. Beat mixture with a wire whisk just until combined.

Fill muffin cups 2/3 full with batter. Bake about 15 minutes or until tops spring back when lightly touched. Cool in cups on a wire rack 5 minutes. Remove from cups.

Cool completely. Sprinkle with powdered sugar and/or cocoa powder.