2 cups cake flour
1/4 cup finely grated lemon zest (from 3 lemons)
1 teaspoon baking powder
1/2 teaspoon salt
2 sticks unsalted butter, at room temperature
2 cups sugar
6 large eggs, at room temperature
1/4 cup whole milk
1/4 cup fresh lemon juice
1 teaspoon pure vanilla extract
Vegetable oil, for brushing
4 large peaches, sliced into 1/2-inch wedges
Lightly sweetened whipped cream