If you like baking you know exactly how frequently you would use sugar in different recipes. You obviously use it when you are baking cakes and cookies. However, sugar is also used in rolls and breads; it feeds the yeast which helps the bread rise.
Most people that bake will tell you that they would never replace butter with any other ingredient in their baking. While some recipes call for melted butter, others use browned butter, sometimes it’s beaten with eggs and sugar while others use cubed and cold.