BROWNIES: Preheat the oven to 350 degrees F. Line a 9x9 inch (8x8 inch works, but we prefer 9x9) baking pan with parchment paper leaving an overhang. Follow package directions to prepare the brownies -- do NOT add a fudge packet if it came with your brownies (reserve the packet for later). Very finely chop up 6 Oreos and add to the brownie ingredients. Stir everything together to get a thick brownie batter. Transfer to the prepared pan and bake according to package instructions. Don't over-bake. As soon as brownies are baked, remove from the oven and allow to cool for 3-4 minutes. Now IF you had a fudge packet, spread it over the brownies here. Cover the brownies tightly and place in the fridge (or freezer) while preparing the frosting layer.
In a large bowl, beat together the room temperature (not melted at all!) cream cheese and butter until creamy.
Beat in the peppermint extract, salt, and food coloring. Slowly add in the powdered sugar beating in between additions.
Beat until smooth and creamy. Resist the urge to add milk or cream, it will come together, just keep beating it! Taste and add more peppermint extract if desired.
Stir in the finely crushed peppermint candy (I blend full candy canes until the are a fine powder)
Spread on top of the cooled brownies and return the brownies to the freezer while preparing the topping.