
Few things hit harder than a freshly baked pretzel bun — that deep mahogany crust, the chewy pull, the satisfying crunch of coarse salt on top. The secret here is a genuinely clever technique: baking soda is roasted in the oven first, which ramps up its alkalinity and gives these buns that signature pretzel flavor and color you just can't fake. Each bun gets a quick dip in the alkaline bath before baking, which is exactly what creates that glossy, crackly exterior. The ingredient list is refreshingly short — flour, yeast, butter, egg, salt — so there's no hunting down specialty items or worrying about what's hiding in a store-bought version. People who need to avoid tree nuts often find packaged breads and buns risky territory, but everything here is straightforward and easy to verify. Shape them tight, score the tops, and let the oven do the rest — the result is a bun sturdy enough for a loaded burger but honestly good enough to eat plain off the rack.
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Spread the baking soda in a thin layer on a foil-lined baking sheet and bake at 250°F (120°C) for 1 hour, then let cool completely. Baked baking soda is significantly more alkaline than raw baking soda and produces a deeper pretzel crust and flavor. Store any unused portion in an airtight container.
Combine the warm water, yeast, and sugar in the bowl of a stand mixer and let stand for 5 minutes, until foamy and fragrant.
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