Line a 4-sided jelly roll pan with foil. Cover with a single layer of pretzels. Melt two sticks of butter in a small saucepan. Add one cup brown sugar and stir together. Boil just a little and keep stirring until it gets darker. *You want to let it cook just to the point that you think you may have ruined everything. That's when the caramelly, sticky magic happens. Pour over pretzels. Bake at 350 for 5ish minutes. Remove from oven and immediately throw your chips on. The heat will melt them, then scrape your rubber spatula over them to spread them around. Sprinkle liberally and generously and graciously and lovingly with sea salt. Cool a bit on the counter. Then pop into the freezer for an hour or until you remember it's in there. Break apart into bite sized (aka fist-sized) pieces. Fall asleep with salty lips. Wake up with bark mouth.