4ouncessemisweet or bittersweet chocolatemelted and cooled
Instructions
In standing mixer fitted with the whisk attachment, beat butter at medium-high speed until smooth, about 20 seconds. NOTE: if using a hand-held mixer, increase mixing times by at least 50%.
10 tablespoons salted butter
Add powdered sugar and salt, and beat at medium-low speed until most of the sugar is moistened, about 45 seconds.
1 cup powdered sugar, 1 pinch table salt
Scrape down bowl and beat at medium speed until mixture is fully combined, about 15 seconds; scrape bowl, add vanilla extract, and beat at medium speed until incorporated, about 10 seconds.
1 ½ teaspoons vanilla extract
Reduce speed to low and gradually add the melted and cooled chocolate.
4 ounces semisweet or bittersweet chocolate
Increase speed to medium-high and beat until light and fluffy, about 4 minutes, scraping down bowl once or twice.
Use immediately or store in refrigerator. If refrigerated, allow frosting to come to room temperature before use.
Notes
This recipe makes enough buttercream to frost 12 cupcakes or a 1-layer cake; double this recipe for a 2-layer cake or if you would like to frost your cupcakes with more frosting using a decorative piping tip.Source: Adapted from the America's Test Kitchen Complete TV Show Cookbook