In a bowl, mix dry yeast, sugar, and lukewarm water. Let it sit until frothy.

In a large mixing bowl, combine flour and table salt. Add the yeast mixture and softened butter. Mix until a dough forms.

Knead the dough on a floured surface until smooth, about 5-10 minutes. Place in a greased bowl and cover. Let it rise in a warm place until doubled.

Preheat the oven to 425°F (220°C).

In a large pot, bring 8 cups of water to a boil and add baking soda.

Divide the dough into 8 equal pieces. Shape each piece into a pretzel corner.

Boil each pretzel corner in the baking soda water for about 30 seconds, then remove and place on a baking sheet.

Sprinkle coarse salt on top of each pretzel corner.

Bake in the preheated oven for 20 minutes or until golden brown.