Measuring flour by weight yields the most consistent results—use a kitchen scale if possible. If using measuring cups, fluff the flour before spooning it into the cup and leveling off. This helps avoid compressing the flour and creating a dense cake. Peaches can be used peeled or unpeeled based on preference, and may be sliced or diced. Ensure all refrigerated ingredients reach room temperature prior to mixing for optimal texture. Pure vanilla extract is recommended for superior flavor. Topping the cake with additional sugar before baking will give it a golden, crispy finish. In the absence of enough peaches, consider substituting with nectarines, apricots, or plums.