- 1/2 cup unpopped popcorn
- 3 tablespoons butter, melted
- 2 tablespoons grated Parmesan cheese
- 1/2 teaspoon garlic salt, or more to taste
- 1/2 teaspoon dried crushed rosemary (optional)
- Pop popcorn in a air popper according to manufacturer's instructions; transfer to a large bowl. Drizzle butter over popcorn; stir to evenly coat. Sprinkle Parmesan cheese, garlic salt, and rosemary over popcorn; toss to coat.