In a small bowl, dissolve sugar in warm water and sprinkle yeast over the top. Let sit for 5-10 minutes until foamy.
In a large mixing bowl, combine flour and salt. Add the yeast mixture and softened butter.
Mix until a dough forms, then knead on a floured surface for about 8-10 minutes until smooth and elastic.
Place the dough in a greased bowl, cover with a damp cloth, and let rise for about 1 hour or until doubled in size.
Punch down the dough and shape it into a loaf. Place it in a greased 9x5-inch loaf pan.
Cover and let rise again for about 45 minutes until it reaches the top of the pan.
Preheat oven to 375°F (190°C). Bake for 25-30 minutes until golden brown and sounds hollow when tapped.
Remove from the oven and let cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
