1 (16.5 ounce) jar sweet cherries, drained (Morello cherries from Trader Joes)
1 (18.25 ounce) package fudge brownie mix, batter prepared as directed
1 cup chopped Oreo cookies
3/4 cup butter, cut into pieces
Preheat oven to 375 degrees F (190 degrees C). Spray 9×13 baking dish with cooking spray.
Dump cherry pie filling into dish and spread evenly. Repeat with jarred cherries, not including juice.
Prepare brownie mix as directed and spread over the top – DO NOT STIR. Sprinkle with chopped Oreo cookied. Distribute butter pieces evenly over the top.
Bake in the preheated oven for 40-45 minutes.