Preheat the oven to 350°F. Line 2 or 3 baking sheets with parchment paper or lightly spray with cooking spray.
In a large mixing bowl, whisk together the cake mix and cocoa powder until combined.
1 box dark chocolate cake mix, ¼ cup Dutch process cocoa powder
Add the eggs and melted butter. Stir until a soft, smooth dough forms.
2 large eggs, ½ cup salted butter
Fold in the mint and milk chocolate chips until evenly distributed.
1 cup mint baking chips, ½ cup milk chocolate chips
Use a 1 ½ tablespoon cookie scoop to portion dough onto baking sheets, spacing about 1 ½ inches apart.
Gently flatten each cookie slightly with your hand or the bottom of a clean glass.
Bake for 8-12 minutes or until the edges are set and the tops appear slightly wrinkled.
Cool on the baking sheet for 7-10 minutes before transferring to a wire rack to cool completely.
Notes
🥡 STORAGE: Store cooled cookies in an airtight container at room temperature for 3 to 4 days.Keep away from direct sunlight or heat to prevent melting.♨️ REHEATING: Warm cookies in the microwave for 10-15 seconds for a freshly baked taste.You can also reheat a few cookies at 300°F for about 3 minutes in the oven.❄️ FREEZING: Freeze baked cookies in a freezer-safe container for up to 2-3 months.Separate layers with parchment paper to prevent sticking.💡 TIPS FOR BEST RESULTS: Use a cookie scoop for evenly sized cookies.Do not overbake - cookies continue to set as they cool.Add a few extra mint chips on top before baking for a bakery-style look.🍳 ALTERNATE COOKING METHODS:Air fryer: Bake at 320°F for 5-6 minutes, checking for doneness halfway through.Convection oven: Reduce temperature to 325°F and bake for 7-9 minutes.♻️ LEFTOVERS: Keep leftover cookies in an airtight container.Enjoy them as is, or crumble them into ice cream for a fun dessert topping.📝 NOTES: Swap out the chip flavors for different combinations, like white chocolate or butterscotch.Add chopped nuts for extra crunch.Try adding a few drops of peppermint extract for a stronger mint flavor.These chocolate mint cookies stay soft for days and make a beautiful addition to holiday cookie trays.Try drizzling melted chocolate on top for an extra decadent touch.This recipe also works great as a base for brownie-like cookie bars.