Preheat your oven according to the brownie mix instructions, usually around 350°F (175°C). Bake brownies as per the package instructions until a toothpick comes out clean, about 25-30 minutes.

In a large bowl, whisk together the instant vanilla pudding mix and cold milk for about 2 minutes. Stir in green gel food coloring until desired hue is achieved. Let sit for about 5 minutes.

Crush the Mint Oreo cookies in a zip-top bag using a rolling pin or hands into a mix of fine crumbs and larger chunks.

Layer half of the brownie cubes evenly in a clear trifle bowl.

Spoon half of the mint pudding mixture over the brownie layer.

Layer half of the thawed frozen whipped topping over the pudding.

Sprinkle a handful of crushed Mint Oreos over the whipped topping.

Repeat layering process with remaining ingredients.

Cover the trifle with plastic wrap and chill in the refrigerator for at least 4 hours.

Garnish with remaining crushed Oreos, additional whipped topping, and green sprinkles before serving.