Apple Crumble Topping – 1 cup (120 g) all purpose flour – 5 tablespoons (67 g) light brown sugar – 3 tablespoons (38 g) granulated sugar – 6 tablespoons (85 g) unsalted butter, melted Apple Crumble Cake – 2 cups (240 g) all purpose flour – 1 teaspoon ground cinnamon – 2 teaspoons baking powder – ¼ teaspoon baking soda – ½ teaspoon salt – ½ cup (113 g) unsalted butter, room temperature – 1 cup (200 g) granulated sugar – 2 large eggs (US), room temperature – 1 teaspoon (5 ml) vanilla extract – 1 cup (240 g) sour cream, room temperature – 2 cups peeled and diced cinnamon apples ½ inch pieces tossed in ¼ teaspoon ground cinnamon
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