Sweet, crunchy caramel corn coated in buttery, golden caramel is an addictive family snack and movie night essential. This classic American confection is perfect for gifting and sharing.
Preheat oven to 250°F and line a large baking sheet with parchment or lightly grease with oil.
Place the popped popcorn in a very large mixing bowl, ensuring it’s free from unpopped kernels.
Melt butter in a saucepan over medium heat, then stir in brown sugar, corn syrup, and salt. Bring the mixture to a gentle boil, stirring constantly.
Allow the caramel mixture to boil for 4-5 minutes undisturbed, then remove from heat and immediately stir in vanilla extract and baking soda, mixing until foamy.
Quickly pour the caramel over the popcorn and toss gently with a spatula to coat evenly. Spread the caramel-coated popcorn on the prepared baking sheet and bake for 45 minutes, stirring every 15 minutes for even coating and maximum crispness.
Cool completely before breaking into pieces and serving. Store in an airtight container for freshness.