I found the recipe on http://savorysweetlife.com/2011/04/chocolate-buttercream-frosting/#more-835.
This is hands down the BEST recipe I've ever had for chocolate buttercream! I used ghirardelli cocoa powder for my recipe. I say when it comes to desserts, never skimp when it comes to the chocolate!
Prep time: 2 mins Cook time: 3 mins Total time: 5 mins Serves: 3 cups
-1 cup unsalted butter (2 sticks or 1/2 pound), softened (but not melted!)
-3 1/2 cups confectioners (powdered) sugar
-1/2 cup cocoa powder
-1/2 teaspoon table salt
-2 teaspoons vanilla extract or 1 teaspoon almond extract (I prefer Watkins Vanilla)
-4 tablespoons milk or heavy cream
Cream butter for a few minutes in a mixer with the paddle attachment on medium speed. Turn off the mixer. Sift 3 cups powdered sugar and cocoa into the mixing bowl. Turn your mixer on the lowest speed (so the dry ingredients do not blow everywhere) until the sugar and cocoa are absorbed by the butter. Increase mixer speed to medium and add vanilla extract, salt, and milk/cream and beat for 3 minutes. If your frosting needs a more stiff consistency, add a little more sugar. If your frosting needs to be thinned out, add additional milk 1 tablespoon at a time.