Peach Crumb Bars

Ingredients For the crust: 1 cup granulated sugar (222g) 3 cups all-purpose flour (378g) 1 teaspoon baking powder ½ teaspoon salt ¼ teaspoon ground cinnamon 1 cup unsalted butter cold, cut into cubes (8oz or 226g) 1 large egg lightly beaten   For the peach layer: ½ cup granulated sugar (110g) 1 tablespoon cornstarch ¼…