Line a baking sheet with foil, cover with nonstick spray, and lay pretzels in a single layer. Preheat oven to 350 degrees.

In a small saucepan over medium heat add butter and brown sugar. Whisk slowly for 4-5 minutes until it's golden brown and bubbly.

Pour caramel mixture over pretzels and put in oven for 5 minutes.

Sprinkle chocolate chips over the bubbling caramel pretzels. Put back in the oven for 2 minutes. Using a rubber spatula spread the melty chocolate evenly. Sprinkle with salt.

Put the baking sheet in the freezer for at least a half hour. Break the pretzel bark into bite size pieces. Store in the fridge.