Jen Perez on Instagram: "Apple crumb cake🍂🍏🍰 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 -4 Granny Smith apples (about 4 cups/450g), peeled and sliced -1/2 cup light brown sugar, packed (100g) -1 1/2 tsp cinnamon -2 1/2 Tbsp water -1 Tbsp lemon juice -4 Tbsp unsalted butter (56g) -pinch of salt -2 tsp cornstarch mixed with 1 Tbsp water Ca