These Brownies with a Mint Buttercream and Chocolate Frosting are devilishly delicious! The mint buttercream layer in the middle is a nice departure from the brownie bottom and insanely rich chocolate frosting. These are the perfect St. Patrick's Day dessert, especially since the mini buttercream center is green and such a nice surprise when you bite into it! I found the recipe from Sally's Baking Addiction, one of my go-to places for inspiration. While I love to create my own recipes, I also appreciate when I find people who are baking insomniacs like me and won't stop until the recipe is just right. Sally McKenney is one of those people!