Wondering "Can I substitute brown sugar for white sugar in baking recipes to make them healthier?" Yes, you can, but please note that it does not make them any healthier.
Simply substitute 1 cup of brown sugar for every 1 cup of white granulated sugar.
Brown sugar contains molasses, which may change the texture and flavor your baked goods, but the sweetness level will be the same. Checking doneness will be the same but the color may be darker.