Spritz the cooking spray over the popcorn and mix well. Toss through the protein powder, salt, cinnamon, and sweetener until the popcorn is well coated.
Transfer the popcorn into serving bowls and enjoy immediately.
Notes
Serving size is 3 cups of popcorn.* Or air fryer popcorn or homemade air popped popcorn.** White sugar or brown sugar works.TO STORE: Leftover popcorn (flavored or unflavored) can be kept at room temperature for up to five days.