In a large mixing bowl, combine the pulsed oats, chocolate protein powder, and cocoa powder until well incorporated.
Add the almond butter, maple syrup, and peppermint extract to the dry ingredients.
Stir the mixture vigorously until a thick, uniform dough forms; if the dough is too crumbly, add water or almond milk 1 teaspoon at a time.
Fold in the mini dark chocolate chips until evenly distributed.
Scoop 1-tablespoon portions of the dough and roll between your palms to form 1-inch diameter spheres.
Place the protein balls on a parchment-lined tray and refrigerate for 30 minutes to firm up before serving.