Peppermint Buttercream Frosting

8 Tbsp (1 stick) butter, at room temperature
1/2 cup finely crushed peppermint candy
3 cups powdered sugar
2-3 Tbsp milk
1-2 Tbsp peppermint schnapps or 1/2 tsp. peppermint extract

Place butter in mixing bowl and blend with an electric mixer on low speed until fluffy. Add peppermint candy, powdered sugar, 2 Tbsp milk, and schnapps or extract. Blend until the sugar is well incorporated. Beat until fluffy and add more milk if frosting seems too stiff.