Apple crumb cake bars🍂🍏🍰 Recipe: Ingredients Crumble Topping -6 Tbsp unsalted butter, cold and diced (85g) -1 cup all-purpose flour (120g) -3/4 cup light brown sugar, packed (160g) -2 tsp cinnamon -Pinch of salt Apple Filling -3-4 Granny Smith apples (about 4 cups, peeled and sliced) -1/3 cup + 1 Tbsp light brown sugar, packed (84g) -1 1/2 tsp cinnamon -2 Tbsp water -2 tsp lemon juice -3 Tbsp unsalted butter (42g) -Pinch of salt -1 1/2 tsp cornstarch mixed with 1 Tbsp water Cake -1 3/4 cups all-purpose flour (210g) -1 3/4 tsp baking powder -1/2 tsp salt -8 Tbsp unsalted butter, softened (113g) -2/3 cup granulated sugar (133g) -3 Tbsp light brown sugar, packed (40g) -2 eggs, room temperature -2 tsp vanilla -1/2 cup sour cream, room temperature (115g) -2 Tbsp milk Instructions For the crumble: 1. Whisk together flour, light brown sugar, cinnamon, and a pinch of salt. 2. Add the cold butter and rub it...