Preheat oven to 350°. Shape dough into 24 balls (about 1-1/4 in.). Press evenly onto bottom and up sides of greased mini muffin cups.
Bake 12-14 minutes or until golden brown. Using the end of a wooden spoon handle, reshape cups as necessary. Cool in pans 15 minutes. Remove to wire racks to cool completely.
Fill cups with 1 teaspoon each peanut butter and Nutella. Top with trail mix.