Preheat oven to 350 degrees F. and line a baking sheet with parchment paper or a silpat liner.
Place peanut butter, pudding mix, egg and chocolate chips into a large mixing bowl. Stir to combine. With a small cookie scoop, scoop dough onto prepared baking sheet, placing 1 inch apart. With tines of a fork, press a criss cross into each cookie. Bake for 11-13 minutes, until baked through. Remove and let cool for 10 minutes before transferring.
Melt chocolate melts in microwave safe bowl until creamy and smooth. Dip cooled cookies halfway into melted chocolate. Place on parchment paper and top with sprinkles. Let chocolate set up and serve.