All-natural, zero preservatives or additives popcorn toppers — yes, they do exist! We hope you love them as much as we do. Nutritional Yeast Based Popcorn Topper. Dairy Free. So cheesy it should come with a rom com. This is our preservative + additive free nutritional yeast popcorn topper. Toss popcorn with olive oil or melted butter, then sprinkle seasoning - or mix directly into the butter before drizzling. Ingredients: Nutritional yeast, sea salt, tomato powder, garlic powder, onion powder.