Dissolve yeast in the warm water in a small bowl or cup. Let sit for a few minutes.
Combine flour, powdered sugar, and salt in a large mixing bowl. Add water with yeast and vegetable oil. Stir with a spoon and then use your hands to form the dough into a ball.
Knead the dough 5 minutes on a lightly floured surface. Dough will be nice and smooth when it's ready. Place the dough into a lightly oiled bowl, cover it, and store it in a warm place for 45 minutes or until the dough doubles in size.
When dough has risen, preheat oven to 425 degrees F.
Make a bath for the pretzels by combining the baking soda with the hot water and stir until baking soda is mostly dissolved.
Remove the dough from the bowl and cut into 12 pieces.
Shape the soft baked pretzels as follows:
Roll each section into a long 24" rope.
Bring the ends up and twist twice.
Bring the ends down and pinch firmly.
Dip each pretzel into the bath solution. Drip dry. Arrange on 2 cookie sheets that have been sprayed with non stick cooking spray.
If you want salted pretzels, sprinkle pretzels with kosher salt. Don't salt any pretzels that you plan to coat with cinnamon/sugar.
Bake one pan at a time. Bake 5 minutes, then spin the pan halfway around and bake another 4 or 5 minutes or until golden.
Remove from oven and brush with melted butter.
If you want the cinnamon/sugar coating, brush with butter and sprinkle heave coating of cinnamon/sugar onto the entire surface of the pretzel.