Grandma Doris always called this her 4 ingredient sweet and salty secret. I finally learned her trick and the pan disappears from the picnic table in

350°F (175°C). Lightly grease a 9×13-inch glass casserole dish with a bit of butter, making sure to coat the corners so the bars release easily.

Place the pretzels in a large zip-top bag and crush them with a rolling pin or the bottom of a heavy pan until you have mostly small pieces with a few larger bits for texture. You’re aiming for coarse crumbs, not a fine powder.

In a medium bowl, combine the crushed pretzels and