FOR THE TOPPING: – 1 cup (125 grams) all-purpose flour , spooned & leveled – 2/3 cup (135 grams) light brown sugar , packed – 1 1/2 teaspoons ground cinnamon – 1/2 cup (115 grams) unsalted butter , softened and cubed into small piece FOR THE CAKE: – 2 cups (250 grams) all-purpose flour , spooned and leveled – 1 teaspoon baking powder – 1/4 teaspoon baking soda – 1/2 teaspoon salt – 1/2 teaspoon ground cinnamon – 1/2 cup (115 grams) unsalted butter , softened to room temperature – 1 cup (200 grams) granulated sugar – 2 large eggs , room temperature – 1 1/2 teaspoons pure vanilla extract – 1 cup (240 grams) sour cream
1
2
3
4
5
6