Preheat oven to 325 degrees. Spray muffin cups with cooking spray.
Prepare brownie batter according to package instructions.
Using a cookie scoop, pour 1 scoop of batter into prepared muffin cups.
Place 1 Milk Way Caramel Apple Mini in the center of the batter. Press down gently (you don't want this to sink to the bottom).
Pour 1 cookie scoop of batter over the top of the candy.
Bake for around 25 minutes, or until a toothpick inserted comes out clean.
Allow to cool for a half an hour, then place in the refrigerator to help set the candy. Allow to come to room temperature before removing from the muffin tins.