How much brown sugar do I add to one third cup to make half cup brown sugar?
In purely US volumetric cooking measurement units, 1/3 cup plus two tablespoons and two teaspoons is exactly 1/2 cup.
1 cup is 16 Tablespoons
1 Tablespoons is 3 teaspoons
1 cup is 48 teaspoons
1/2 cup is 24 teaspoons
1/3 cup is 16 teaspoons
The difference is 8 teaspoons
1/3 of a cup plus 8 teaspoons is 1/2 cup
In more compact measurements, 1/3 cup plus two tablespoons and two teaspoons is 1/2 cup.