Betty Crocker® brownie mix and frosting come together in this bar to create a mouth-watering dessert - perfect to serve a bunch.
Step 1 Heat oven to 350°F. Spray 13x9-inch pan with cooking spray. In medium bowl, stir together marshmallow creme, mint extract and 4 drops of the food color until light green.
Step 2 In large bowl, make brownie mix as directed on box, using water, oil, eggs and fudge pouch. Spread batter in pan. Drop 4 or 5 large tablespoonfuls of marshmallow mixture onto batter (reserve remaining marshmallow mixture). Gently pull table knife through marshmallow mixture and batter in S-shaped curves in continuous motion for marbled design. Spread evenly in pan.
Step 3 Bake 25 to 28 minutes or until set. Cool completely, about 1 hour.
Step 4 In small microwavable bowl, microwave baking chips on High 30 seconds; stir. Microwave 30 seconds longer; stir until smooth. Stir melted chips and frosting into remaining marshmallow mixture. Stir in remaining 4 drops food color until light green; spread over cooled bars. Sprinkle with cookies; press in slightly. For bars, cut into 6 rows by 4 rows.
Recipe is courtesy of: http://www.bettycrocker.com/recipes/fudge-mint-cookie-bars/2e26fb24-e406-4b23-8e63-97b4c671f6d3