Add the yeast to the warm water. Sprinkle the sugar on top. Let proof until the yeast is frothy.
In a separate, medium-sized bowl, add 3 cups of flour and the salt. Pour in the yeast mixture and mix well.
If using a mixer, keep adding flour until you get a very soft, slightly sticky dough. If mixing by hand, turn the dough out onto a heavily floured surface and knead in more flour until the dough reaches the right consistency.
Let dough rest while you grease a large cookie sheet with butter.
Roll the dough out onto the cookie sheet, about 1/2 inch thick.
Cut into breadsticks with a sharp knife or pizza cutter.
Cover and let rise until large and puffy, 30-60 minutes.
Bake in a 350-degree oven for 20 minutes.
As soon as you remove them from the oven, rub butter gently over the top. Then sprinkle lightly with kosher salt and garlic powder.