Divide the dough into 5 equal pieces. Roll into balls. Cover with plastic wrap and let rest on a floured counter or board for 5 minutes.
Roll 1 ball into a thin rope 30 inches long. Twist into a pretzel shape. Brush lightly with water, then sprinkle with the salt. Place on a large, parchment-lined baking sheet. Repeat with the remaining dough. Let rest 15 minutes while oven preheats to 450° F.
Bake on center oven rack for 15 minutes, until golden brown. Transfer the pretzels to a rack. While hot, brush on the butter. Serve warm.