Preheat your oven to 350 degrees and grease a jelly roll pan. Set aside.
In a large bowl, add the flour, baking soda, and salt. Stir together and set aside.
In a medium bowl, add the softened butter, sugar, brown sugar, and vanilla. Beat together until creamy.
Add eggs, one at a time, mixing well between each addition.
Pour in the chopped Crunch 'n Munch and stir together to distribute.
Spread into the prepared pan, press additional popcorn into the top, then bake for 25-30 minutes or until golden brown.
Let cool slightly then slice into bars.