01 -
Preheat the oven to 350°F. Grease a 9×9-inch square baking pan or line with parchment paper.
02 -
In a large mixing bowl, cream 3/4 cup softened unsalted butter with 1 cup granulated sugar using an electric mixer or whisk until light and fluffy, about 2-3 minutes. Beat in eggs one at a time, then stir in vanilla extract. In a separate bowl, whisk together 1 1/2 cups flour, 1 teaspoon baking powder, and 1/4 teaspoon salt. Gradually add the dry ingredients to the creamed mixture, mixing just until combined. Fold in diced apples.
03 -
Spread the cake batter evenly into the prepared pan.
04 -
In a medium bowl, combine 1 cup flour, 1 teaspoon cinnamon, 1/4 teaspoon salt, 1/2 cup brown sugar, and 1/4 cup granulated sugar. Add 1/2 cup cold, cubed unsalted butter. Use a pastry cutter or your fingertips to blend until the mixture resembles coarse crumbs with pea-sized butter pieces.
05 -
Sprinkle the crumb topping evenly over the cake batter. Bake for 30–45 minutes, or until a toothpick inserted into the center comes out clean and the topping is golden brown. Cool slightly in pan before removing.
06 -
In a small saucepan over medium heat, melt 1 tablespoon unsalted butter. Stir in 1/2 cup brown sugar, 1 teaspoon cinnamon, 2 tablespoons milk, and a pinch of salt. Cook, stirring occasionally, for 2–3 minutes until dissolved and smooth.
07 -
Drizzle the warm syrup over slices of apple crumb cake. For a special touch, serve with vanilla ice cream or a dollop of fresh whipped cream.