Flavacol is a popcorn seasoning salt widely used in movie theaters to create that signature buttery, salty flavor. It’s a fine, orange-yellow powder made with salt, artificial butter flavor (diacetyl), and coloring agents, which is what gives movie theater popcorn its vibrant color and rich, savory taste.

Harkins, Cinemark and AMC are offering discounts and freebies for National Popcorn Day on Sunday. Here's how to score the deals in Arizona.

Movie theater popcorn may seem impossible to recreate at home, but it turns out there's one secret ingredient that makes the classic cinema snack special.