In a bowl, combine warm water and yeast. Let it sit for about 5 minutes until foamy.

In a large mixing bowl, combine flour, sugar, and salt. Add the melted butter and yeast mixture. Mix 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 it, and let it rise for 1 hour or until doubled in size.

Preheat the oven to 450°F (232°C).

Prepare a baking soda solution by combining 1/2 cup baking soda with 8 cups of water in a large pot. Bring to a boil.

Divide the dough into equal pieces and shape each piece into a bunny shape.

Boil each shape in the baking soda solution for about 30 seconds, then place them on a baking sheet lined with parchment paper.

Mix the egg with 1 tablespoon of water and brush it over the pretzels. Sprinkle with coarse sea salt.

Bake for 12-15 minutes until golden brown.