Heat oil in a large pot.

Add corn kernels to the pot and cover.

Shake the pot occasionally until all kernels are popped.

Set popped popcorn aside in a large bowl.

Melt butter in a large pan over medium heat.

Add corn syrup and sugar to the melted butter.

Bring the mixture to a boil and continue boiling until it turns amber in color, stirring constantly.

Remove the pan from the heat.

Stir in vanilla extract, baking soda, and salt.

Pour the sugar mixture over the popcorn in the bowl.

Coat all the popcorn evenly with the sugar mixture.

Spread the coated popcorn on a baking sheet.

Let the popcorn cool completely before serving.