Chocolate Mint Brownies

4 eggs
2 c. sugar
1 tsp. vanilla
1 c. flour
4 squares unsweetened chocolate
1 cup butter.
Beat eggs. Add sugar and vanilla; beat well. Melt chocolate and butter and add to mixture. Add flour. Bake in a 9 x 13 pan at 375 for 20-25 minutes. Cool.
Mint Frosting: Mix 4 T. butter, 2 c. powdered sugar, a few drops of green food coloring and peppermint extract. Add a few drops of milk if needed to make spreading consistency. Spread on brownies chill one hour.
Chocolate topping: Melt 6 T. butter and 6 oz. chocolate chips over low heat, stirring constantly. Pour over brownies and chill until firm.