Chocolate Peanut Butter Cupcakes

1 package chocolate cake mix
1 1/4 cups water
1/2 cup peanut butter
1/3 cup canola oil
3 eggs
24 miniature peanut butter cups

Frosting
6 ounces semisweet chocolate, chopped
2/3 cup heavy wipping cream
1/3 cup peanut butter
Additional miniature peanut butter cups, chopped

1. In a large bowl, combine the cake mix, water, peanut butter, oil and eggs; beat on low speed for 30 seconds. Beat on medium for 2 minutes or until smooth.
2. Fill paper-lined muffin cups half full. Place a peanut butter cup in the center of each cupcake. Cover each with 1 tablespoonful batter.
3. Bake at 350 for 18-22 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pans to wire racks to cool completely.
4. Place chocolate in a smal bowl. In a small saucepan, bring cream just to a boil. Pour over chocolate; whisk until smooth. Stir in peanut butter. Cool, stirring occasionally, to room temperature or until ganache reaches a spreading consistency, about 10 minutes.
5. Spread over cupcakes; immediately sprinkle with additional peanut butter cups. Let stand until set.