To find the amount of flour in the original recipe, we first need to understand how the ratio of the ingredients changes when reducing the recipe from 4 loaves to 1 loaf.
The original recipe makes 4 loaves and calls for a total of 2 cups of sugar. Since Kendra wants to make only 1 loaf, we need to calculate the amount of sugar needed for 1 loaf:
\[ \text{Sugar for 1 loaf} = \frac{2 \text{ cups}}{4} = 0.5 \text{ cups} \]
The updated recipe calls for a total of 2.5 cups of flour and sugar combined for 1 loaf. Therefore, we can set up the equation:
\[ \text{Flour} + \text{Sugar} = 2.5 \text{ cups} \]
Substituting the amount of sugar for 1 loaf:
\[ \text{Flour} + 0.5 = 2.5 \]
Now, solve for the amount of flour:
\[ \text{Flour} = 2.5 - 0.5 = 2 \text{ cups} \]
Thus, the original recipe has 2 cups of flour.