Chocolate Mint Bars

How about we celebrate St. Patty's Day with a yummy bar full of a brownie base, green minty center and chocolate glaze over the top?  Okay, I think we shall.  These are amazing and kinda like potato chips, you can't eat just one.  So proceed with caution. 

Ingredients:
1 1/2 cups (3 sticks) plus 6 tablespoons butter, divided
2 cups white sugar
2 teaspoons vanilla extract
4 eggs
3/4 cup cocoa
1 cup all-purpose flour
1/2 teaspoon baking powder
2 2/3 cups powdered sugar
1 tablespoon plus 1 teaspoon water
1 teaspoon mint extract
4 drops green food color
1 cup semi-sweet chocolate chips

Directions:
Preheat oven to 350 degrees. Grease 13x9-inch baking pan. Place 1 cup (2 sticks) butter in large microwave-safe bowl. Microwave at medium heat for 2 minutes or until melted. Stir in granulated sugar and vanilla. Add eggs; beat well. Add cocoa, flour and baking powder; beat until well blended. Pour batter into prepared pan. Bake 30 to 35 minutes or until wooden pick inserted in centers comes out clean. Cool completely on wire rack.
To prepare the mint cream center, combine powdered sugar, 1/2 cup (1 stick) butter, water, mint extract and food color. Beat until smooth. Spread evenly on brownies. Cover; refrigerate until cold.
Prepare Chocolate Glaze by placing remaining 6 tablespoons butter and chocolate chips in small microwave-safe bowl. Microwave at medium heat for 1 minute or until mixture is smooth when stirred. Cool slightly; pour over chilled dessert. Cover; refrigerate at least 1 hour before serving.