Mix flour with yeast and sugar, add milk and salt and knead a yeast dough.
Cover and let sit for about 45 minutes until this has about doubled in size.
Knead the dough well a few more times on a floured surface and form it into a roll about 20 cm long.
Cut 10-12 pieces from the roll and form them into long strands by rolling or twisting them again to make pretzels.
In a saucepan, boil 1.5 liters of water with 2 tablespoons of household soda and boil for 10 minutes until bubbling.
Put the pretzels one after the other into the boiling lye and let them cook for 20-30 seconds while submerging them again and again. Lift out with a slotted spoon and drain.
Place the cooked pretzels on a greased baking tray or tray lined with baking paper and sprinkle with coarse salt.