In a medium pot on the stovetop, bring the brown sugar, honey, coconut oil, and salt to a boil. Boil for 1 minute.
Add in the peanut butter and vanilla. Stir.
Put the oats and Rice Krispies in a large mixing bowl.
Pour the mixture from the pot over the oats and Rice Krispies. Stir.
Spread parchment paper onto two cookie sheets.
Lay the granola bar mixture on the parchment paper.
Press a second cookie sheet on top to flatten. Sprinkle chocolate chips over and press again.
Freeze flat on the tray. When frozen, transfer the granola bars to freezer bags, remove the excess air, seal, and freeze again.