Learn How to Make Brown Sugar so you can get that rich, caramel flavor in all of your baking including my Chocolate Chip Cookies, Gingerbread & more! Light Brown sugar 1 Cup (8 oz/240g) white sugar 1 teaspoons molasses (treacle) Dark Brown sugar 1 Cup (8 oz/240g) white sugar 2 teaspoons molasses (treacle) Instructions Combine sugar and molasses in a mixing bowl. Using your fingertips rub in the molasses until the molasses is completely incorporated and the sugar turns brown. Store in an air-tight container for months. Because of the moisture, brown sugar has a tendency to clump together, to prevent this add a slice of white bread in the container and that will keep the sugar dry and fine.