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

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.

Pour the melted milk chocolate onto the prepared baking sheet, spreading it out evenly with a spatula to about 1/4 inch thick.

Place the 12 mini pretzels onto the chocolate for the reindeer antlers. Add 12 red M&M's below the pretzels for the reindeer noses. Place candy eyes above the noses to complete the reindeer faces.

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.

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.

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!