makes 12 cupcakes
1 1/8 cups all purpose flour
1/4 cup unsweetened cocoa powder
1 1/4 teaspoon baking powder
1/2 teaspoon salt
1 cup granulated sugar
1 large egg
2 teaspoons vanilla extract
1/2 cup fat-free milk
3 tablespoons heavy cream
1/2 cup butter, melted and cooled
2 tablespoons sour cream
2/3 cup milk chocolate chips
Preheat oven to 350 degrees F/ 175 C.
In a bowl, whisk egg and sugar until smooth and no lumps remain. Add milk, cream and vanilla, and mix until combined. Stir in sour cream. Sift dry ingredients together and add to wet mixture. Mix until batter is smooth. Add in melted butter and stir until smooth. Fold in chocolate chips. Line a muffin tin with liners and using a 1/4 cup measure, add batter to each cup. Bake for 15-18 minutes. Let cool before frosting.
Chocolate Cream Cheese Frosting
3 8-ounce blocks of cold cream cheese
3/4 cup unsweetened cocoa powder
3 1/2 cups powdered sugar
2 1/2 ounces milk chocolate, melted and cooled
1 tablespoons vanilla extract
In the bowl of an electric mixer, beat cream cheese until smooth. Add in vanilla. With the mixer on low speed, slowly add powdered sugar 1/2 cup at a time and add cocoa powder, increasing the speed to mix. Add in melted chocolate. If the frosting it a bit too thick, add milk 1 teaspoon at a time until desired consistency is reached. If it is too thin, add additional sugar gradually. Frost cupcakes once cooled. Top with chocolate sprinkles, shaved chocolate, chocolate bars, etc.
Note: as you can see I used a TON of frosting on my cupcakes. I had about 1/2 cup of frosting left over, so if you plan to use less frosting (i.e. you are going to spread it on with a spatula or use a tiny blob), then cut this recipe in half.
Source: http://www.howsweeteats.com/2012/02/chocolate-lovers-cupcakes/