Mint Chocolate Brownies

Mint Chocolate Brownies
Chocolate Mix-
1 stick of butter
1 c water
1/2 c shortening
4 T unsweetened cocoa
Cake Mix-
2 eggs
2 c sugar
1 t cinnamon
1 t baking soda
1 t vanilla
1/2 c buttermilk*
2 c flour
Mint Mix-
1 - 12 oz. bag mint chips
1/3 c milk
Frosting-
1 stick of butter
4 T unsweetened cocoa
6 T milk
1 t vanilla
3-4 c powdered sugar

1. Preheat oven to 400*.
2. Place Chocolate Mix in a small sauce pan, on low, until melted and well mixed. Take off heat and set aside.
3. Mix Cake Mix in a large bowl. Add Chocolate Mix.
4. Grease and flour a cookie sheet (with 1/2" sides). Pour batter on cookie sheet, spread evenly, and bake for 22-25 minutes until it passes toothpick test.
5. Let cake cool for at least 10-15 minutes.
6. Melt Mint Mix in microwave, stirring every 20 seconds until fully melted and smooth; spread over brownies. At this point, I like to put the brownies in the freezer to cool the mint while I make the frosting.
7. Frosting: Melt butter, cocoa, and milk in a small sauce pan, on low. Take off heat, add vanilla and powdered sugar until desired consistency. Mix well; spread over brownies.

*To make "buttermilk", combine .5 c. milk with 1 T. vinegar. Mix well and let sit a few minutes before adding to recipe.