Preheat your oven to 350 degrees F.
Lightly grease a 13x9" baking dish with butter.
Trim parchment paper to fit the bottom of the baking dish, with a little extra on two edges so the brownies can be removed later more easily.
Mix the melted butter, brown sugar, vanilla, and mint in a mixing bowl.
Mix in the eggs one at a time, blending thoroughly.
Sift together the flour, cocoa powder, and salt.
Gradually mix the flour mixture into the egg mixture, stirring until blended.
Mix in your Andes candies or chocolate chips.
Spread your batter evenly in the baking dish, on top of the parchment paper.
Bake for 33+ minutes. After about 33 minutes, use a toothpick to check the brownies. Once it comes out clean, they're done.
Let the brownies cool, then lift them gently with the parchment paper to remove them from the dish.
Cut, decorate, serve, and enjoy!