Spray a 9” cake pan with cooking spray and set aside.

In a large pot, melt the butter over medium heat.

Add the marshmallows and stir to coat with butter. Continue stirring until all marshmallows have completely melted. Remove pot from heat and pour in the crispy rice cereal. Stir cereal into marshmallow mixture until fully incorporated.

Transfer the mixture to the prepared cake pan and press to flatten into an even layer. Allow the rice krispie treats to cool completely.

Once cooled, gently run a butter knife around the edge of the pan. Lay a large cutting board or platter on top and flip the cake pan over - carefully transferring the treats.

Use a large sharp knife to slice into 8 even servings.

Melt the white chocolate according to package directions. Spread a small amount on the back of chocolate covered pretzels and press two onto each treat for the antlers.

Add white chocolate to the back of candy eyes and press two onto each treat.

Do the same to add an m&m nose to complete each reindeer rice krispie treat.

Store treats in an airtight container for up to 3 days.