Prepare brownies in a 9x13 inch baking dish according to package directions, then allow to cool completely.
In a mixing bowl, beat together sugar, cream cheese and peppermint extract until completely blended. Add 1 ½ cups Andes Mint Baking Chips and stir until combined. Fold in 2 cups whipped topping. Spread over brownie.
In another mixing bowl, whisk together milk and instant pudding mix until combined and thickened. Pour over cream cheese layer and spread evenly.
Top the brownie lush with remaining whipped topping. Sprinkle with Andes Mint Baking Chips.
Refrigerate at least 4 hours prior to slicing and serving.
ENJOY!