Once the baked baking soda is ready to come out of the oven, remove it carefully (being sure not to breathe it in or touch it with bare hands).Set pan to cool on the stovetop until ready to use. Preheat the oven to 450°F.Line 3 baking sheets with parchment paper and spray generously with nonstick cooking spray. You will be able to get about 6 large pretzels per baking sheet.Set aside. Once dough has risen, turn dough out onto countertop. Cut the dough into 16-20 equal sections and roll each section into 24"-30" strips.
Shape each dough "rope' into a traditional pretzel shape by making a U shape and pulling the ends together at the top of the "U". Then twist the ends (you can do this 1 or 2 times), then bring the twisted section back down to the bottom of the "U" shape and pinch to seal the dough.
Meanwhile, get your baking soda solution ready. In a large glass or metal bowl, add 4 cups of very hot tap water (as hot as it will go).Whisk in the baked baking soda, until dissolved (there may be a couple small clumps a the bottom but that won't be a problem). Whisk it as well as you can until the baking soda is dissolved. Set aside. Then take your first formed pretzel and carefully lift it and place in the water solution for about 1 minute. It should float to the top.
Remove from solution and place onto prepared baking sheet (about 6 will fit on each baking sheet).Sprinkle with pretzel salt. We love this kind! Repeat this proess with remaining dough, rolling then dipping in the solution, then sprinkling with the pretzel salt.
Bake each pan for 7-9 minutes until very golden brown (the more brown they are, the more any baking soda flavor will bake off - don't cook them too light!).
Once browned well, remove from oven and immediately brush with a generous amount of butter. Enjoy!
These taste best warm! If you want to reheat, use the Air Fryer! 400°F for 5-7 minutes each. Or you could use a convection setting on the oven as well.
Store in airtight containers in the fridge.