In a mixing bowl, combine warm water, yeast, and sugar. Let it sit for about 5 minutes until it becomes frothy.

Add flour and salt to the yeast mixture. Stir until a dough forms, then knead for about 5 minutes until smooth and elastic.

Place the dough in a greased bowl and cover it with a damp cloth. Let it rise in a warm place for about 30 minutes, or until it doubles in size.

While the dough rises, bring 10 cups of water and the baking soda to a boil in a large pot.

Once risen, punch down the dough and divide it into 8 equal portions. Roll each piece into a long rope and twist it into a pretzel shape.

Carefully place each pretzel into the boiling baking soda bath for about 30 seconds.

Transfer the pretzels to a parchment-lined baking sheet. Brush them with beaten egg and sprinkle with coarse salt.

Bake at 425°F for 12 to 15 minutes, until golden brown.

Brush the pretzels with melted butter as soon as they come out of the oven.