Cream the butter and sugar together in a mixing bowl. Add eggs and vanilla and mix well. Add flour and cocoa then mix again. Bake in a greased 12x18 inch cookie sheet @350 for 20-30 minutes. Cool. Frost with mint frosting first.
After frosting brownies with mint frosting, let frosting set up hard before frosting with chocolate frosting. Put in fridge for an hour.
Chocolate frosting:
Melt cocoa and butter together, then add remaining ingredients and mix until smooth.
Frost with chocolate frosting carefully.
ENJOY!!
Recipe by Uplifting Mayhem at https://www.upliftingmayhem.com/best-chocolate-mint-brownies/