Pre-heat oven to 250 degrees, line a baking sheet with parchment paper

Melt butter in a sauce pan over medium heat. Stir in brown sugar, corn syrup and salt. Bring to a boil without stiring for 4 minutes

Remove from heat and add in Sriracha, vanilla and baking soda

In a large bowl combine popcorn and brown sugar mixture until evenly coated

Spread popcorn over baking sheet and place in oven for 45 minutes

Stir popcorn every 15 minutes to make sure it is evenly coated

Let cool before enjoying