Prepare one box of brownie mix according to the package instructions.

(If you are baking at high altitude, follow high-altitude adjustments so the brownies stay soft and moist.)

Bake the brownies as directed and allow them to cool completely.

Chocolate Frosting:

Use one pre-made can of chocolate frosting.

Stir the frosting well until it becomes lighter and fluffier.

Green Mint Frosting:

In a small bowl, add a small capful of mint (menthe) flavoring.

Mix in powdered sugar and a small amount of water to create a thin frosting paste.

Add more water if the frosting is too thick, or more powdered sugar if it is too thin.

Stir in 2 drops of green food coloring until evenly combined.

Spread the chocolate frosting evenly over the cooled brownies.

Spoon small amounts of the green mint frosting on top of the chocolate frosting.

Use a toothpick or the back of a spoon to gently swirl the two frostings together, creating a marbled effect.