In a bowl, combine warm water, sugar, and yeast. Let it sit for 5 minutes until it bubbles.
Add salt and flour gradually, mixing until a dough forms.
Knead the dough on a floured surface for about 5 minutes until smooth.
Place the dough in a greased bowl, cover, and let it rise for 1 hour.
Preheat the oven to 425°F (220°C) and line baking sheets with parchment paper.
Divide the dough into 12 equal pieces and roll each into a long rope.
Shape each rope into a pretzel by twisting the ends together.
Prepare a baking soda bath by boiling 4 cups of water with 1/4 cup of baking soda.
Dip each pretzel in the baking soda bath for 30 seconds, then place on the baking sheet.
Sprinkle with coarse sea salt and bake for 12-15 minutes until golden brown.