Doubled Sugar Measurement for Cake

Shannon has a special recipe for her carrot cake. The recipe requires 3/4 cup of sugar, 2/3 cup of butter, and 1/2 cup of grated carrots. Shannon wants to make a larger cake by doubling the recipe. However, she only has a 1-cup measuring cup. She also knows that 1 cup is equal to 8 ounces.

How many ounces of sugar will she need for the doubled recipe? Please provide your answer in the grid-in format as a decimal or fraction.