Do you add the water to one step angel food cake mix when recipe says 1 can lemon pie filling for bars?

No, do not add the water when making angel food bars from a one-step cake mix.

The addition of lemon pie filling to the cake mix provides sufficient liquid for the recipe. Adding the water would result in a cake batter that is too wet and runny, leading to a dense and heavy texture in the finished bars.

By omitting the water, the bars will achieve the ideal consistency and rise properly. The lemon pie filling will add moisture, sweetness, and a delicious citrus flavor to the bars, creating a delightful and satisfying treat.