In a stand-up mixing bowl, add warm water, sugar, and yeast to the bowl. Let sit 5 minutes.
Add softened butter, flour, and then salt. Use a dough hook and mix for 8-10 minutes. Pull dough out of mixing bowl, if the dough is sticking to your hands add flour to your hands. Form into a large ball, place back into the bowl, and cover for 30 minutes,
Remove the dough from the bowl, divide it into 8 pieces, and roll the pieces into a ball.
To prepare traditional bolillo bread, flatten the dough into oval-shaped disks. Next, pull one-quarter of the disk towards you and seal it. Repeat this process until a dough tube is formed. Finally, roll the dough quickly while applying pressure on the ends to achieve the classic bolillo shape.
Cover the dough and let it rise for 30 minutes. Optionally, you can make a lengthwise slit of 1/4 inch deep just before baking the bolillos.
Bake for 8-12 minutes at 385°F.