1 1/2cupsunsalted butter room temperature (1 1/2 cup is 3 sticks)
2tbspmilkwhole or 2%
1tspvanilla extract
2 1/2 cupsconfectioner's sugar powdered sugar
9 ouncessemi-sweet chocolate morsels melted
1/4tsp instant espresso powder
1/2tspsalt
Instructions
In an electric mixer, beat 1 1/2 cups unsalted butter (room temperature), 2 1/2 cups confectioners’ sugar, and 2 tablespoons milk until light and fluffy. Beat on medium to high speed for about 5 minutes, scraping the sides of the bowl as needed.
Place 9 ounces semi-sweet chocolate morsels in a microwave-safe bowl and microwave for 30–45 seconds until soft. Stir the chocolate until it melts into a smooth and creamy texture.
With the mixer on low speed, slowly add the melted chocolate to the butter and sugar mixture.
Turn the mixer to medium speed and beat for another minute until fully combined and smooth.
Add 1 teaspoon vanilla extract, 1/4 teaspoon instant espresso powder, and a pinch of salt, then mix until the frosting is light, fluffy, and well combined.
If the frosting is too thick, add 1 additional tablespoon milk and continue beating until the frosting is smooth and spreadable.
Notes
This recipe is enough to frost 12-16 cupcakes or one standard sheet of round cake.Add more powdered sugar for a thicker consistency.Allow the buttercream to thicken in the refrigerator for 10 minutes before piping it onto cupcakes. Always taste-test; add more espresso, salt, or sugar as needed.