Brown sugar
For each 1 cup firmly packed light brown sugar use 1 ½ Tablespoons molasses plus 1 cup granulated sugar.
To make 1 cup light brown sugar from dark brown sugar, use ½ cup firmly packed dark brown sugar and ½ cup granulated sugar.
To make 1 cup dark brown sugar, use 1 cup firmly packed light brown sugar plus 1 tablespoon molasses; or 1 cup granulated sugar plus 1/4 cup molasses.