If using bagged pre-popped popcorn, spread the popcorn out onto a large baking sheet and place in a pre-heated 350 F oven for 5 minutes to warm the popcorn.
Transfer popcorn to a large bowl.
Combine the butter and soup mix and drizzle over the popcorn.
Add the French fried onions and stir to combine and coat well.
Serve immediately.
Notes
Add your favorite snacks too! Peanuts, pretzel sticks... you name it!