01 - Combine warm water, sugar, and yeast in a large bowl and let sit for 5 minutes until foamy.
02 - Add melted butter and salt to yeast mixture. Gradually incorporate flour until a shaggy dough forms.
03 - Knead dough on a lightly floured surface for 7 to 8 minutes until smooth and elastic.
04 - Place dough in a lightly oiled bowl, cover, and let rise in a warm spot until doubled in size, about 1 hour.
05 - Heat oven to 450°F. Line two baking sheets with parchment paper.
06 - Bring water and baking soda to a rolling boil in a large pot.
07 - Punch down dough and divide into 8 equal portions. Roll each into a 20-inch rope and twist into pretzel shapes.
08 - Carefully submerge each pretzel into boiling baking soda bath for 30 seconds, then transfer to prepared sheets using a slotted spatula.
09 - Brush pretzels with egg yolk wash and sprinkle with coarse sea salt.
10 - Bake pretzels for 12 to 15 minutes until deep golden brown. Allow to cool slightly before serving.