To find out how much flour is used in the body of the dessert, you can subtract the amount of flour used for the crumble from the total amount of flour required.
Total flour required: \( \frac{3}{4} \) cups
Flour used for crumble: \( \frac{1}{4} \) cups
Now, perform the subtraction:
\[ \frac{3}{4} - \frac{1}{4} = \frac{3 - 1}{4} = \frac{2}{4} = \frac{1}{2} \]
Thus, the amount of flour used in the body of the dessert is \( \frac{1}{2} \) cup.