Mint Chocolate Chip Buttercream Frosting

Ingredients
1/2 cup butter, softened
3 tablespoons peppermint extract
1 teaspoon vanilla extract
1/8 teaspoon salt
1 (16-oz.) package powdered sugar
1 to 2 Tbsp. milk
1 (4-oz.) finely chopped bittersweet chocolate baking bar
Preparation
1. Beat first 4 ingredients at medium speed with an electric mixer until creamy.

2. Gradually add powdered sugar alternately with 1 Tbsp. milk, 1 Tbsp. at a time, beating at low speed until blended and smooth after each addition. Beat in finely chopped bittersweet chocolate baking bar.

I used Ghirardelli 60% Cocoa Bittersweet Chocolate Baking Bar.