https://www.mysupersave.com/Recipes/Detail/5369/Cheese_Popcorn
Yield: 4 quarts
Preheat oven to 300 degrees F
Place popped popcorn in two 13 x 9 x 2- inch baking pans.  Drizzle with melted butter.  
Combine garlic and onion powder; sprinkle over popcorn; top with cheese.  
Bake for 5 to 10 minutes until cheese is melted.  Serve immediately.
Please note that some ingredients and brands may not be available in every store.
https://www.mysupersave.com/Recipes/Detail/5369/Cheese_Popcorn