I too LOVE mint brownies...this is a great recipe I found on Foodnetwork.com to make them at home! And it is the BEST!!! Hope it helps!
Ingredients
1 cup sugar
1/2 cup unsalted butter, softened, plus more for greasing pan
1 cup all-purpose flour
2 cups chocolate syrup
4 large eggs, beaten
1/2 teaspoon salt
1 teaspoon vanilla extract
Mint topping:
2 1/2 cups confectioners' sugar
1/2 cup unsalted butter, melted
3 tablespoons creme de menthe liqueur
Chocolate topping:
1 cup semisweet chocolate chips
6 tablespoons unsalted butter
Directions
Preheat the oven to 325 degrees F. Butter a 9 by 13-inch pan.
Cream together the sugar and softened butter. Stir in the flour and mix well. Add the chocolate syrup, eggs, salt, and vanilla and mix everything well. Pour the batter into the prepared pan. Bake for 25 minutes. Let cool.
For the mint topping: Mix the confectioners' sugar, melted butter, and creme de menthe together until smooth. Let cool slightly and spread over the cooled brownies.
For the chocolate topping: Melt the chocolate chips in the butter and pour over the mint topping. Let the brownies and toppings cool completely and cut into 2-inch squares