In a bowl, combine warm water and sugar (if using).
Sprinkle active dry yeast over the water and Let the yeast sit for 5–10 minutes until it becomes foamy and slightly bubbly.
Add melted butter and salt to the yeast mixture.
Add flour gradually until a soft slightly tacky dough forms that pulls away from the bowl.
Transfer dough to a lightly floured surface.
Knead for about 8–10 minutes until smooth and elastic.
Place dough in a greased bowl and cover with a towel.
Let the dough rise in a warm place for about 60–90 minutes or until doubled in size.
Punch down dough gently to release air.
Divide into equal small portions and shape into balls.
Arrange rolls on a greased baking tray with slight spacing.
Cover shaped rolls and allow them to rise for 25–30 minutes until slightly puffy.
Bake for 15–18 minutes until golden and the bottoms sound lightly hollow when tapped.
Brush warm rolls lightly with butter before serving.