Prepare the baking sheet: Line a baking sheet with parchment paper or a silicone baking mat to prevent the chocolate from sticking.

Melt the chocolate: Melt the milk chocolate in a heatproof bowl over a pot of simmering water (double boiler method) or in the microwave in 30-second intervals, stirring between each interval until smooth.

Create the chocolate base: Pour the melted milk chocolate onto the prepared baking sheet, spreading it out evenly with a spatula to about ¼ inch thick.

Decorate with Reindeer Faces: Place the 12 mini pretzels onto the chocolate for the reindeer antlers.

Add Green M&M's and Sprinkles: Scatter the green M&M's and 1 teaspoon of sprinkles over the bark while the chocolate is still wet for added festive color and texture.

Set the Chocolate: Let the bark sit at room temperature until fully set, or place it in the refrigerator for about 20-30 minutes to speed up the process.

Break and Serve: Once the chocolate is completely set, break it into pieces with your hands. Enjoy your festive reindeer bark or package it up as a holiday treat for friends and family!