Katie's Magic Mint Bars

Why I Love This Recipe
I invented these as a substitute for my PB bars for someone who hates peanut butter
Ingredients You'll Need
Brownie Base
Your favorite brownie mix, prepared according to instructions on the box.
Filling
1 cup butter, softened
1 teaspoon vanilla extract
4 cups confectioners' sugar
2 tablespoons milk
2 teaspoon peppermint extract
Frosting
1 cup semisweet chocolate chips
1/4 cup butter
Directions
Cool the brownies for 10 minutes after baking.
In small bowl, beat all Filling ingredients with electric mixer on medium speed until smooth. Spread mixture evenly over brownie base.
In microwavable bowl, microwave all Frosting ingredients on High 30 seconds; stir until smooth. Cool 10 minutes; spread over filling. Refrigerate 30 minutes or until set. For bars, cut into 9 rows by 4 rows.
High Altitude (3500-6500 ft): No change.