Ingredients:

  • 1 cup (120g) all-purpose flour, plus more for dusting
  • ½ cup (100g) granulated sugar
  • ½ cup (115g) cold unsalted butter, cut into small cubes
  • ½ teaspoon ground cinnamon
  • Pinch of salt
  • ½ cup (115g) unsalted butter, softened
  • ½ cup (100g) granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 ½ cups (180g) all-purpose flour
  • 2 teaspoons baking powder
  • ½ cup (120ml) milk
  • Pinch of salt
  • 4 medium apples (such as Granny Smith, Honeycrisp, or Braeburn), peeled, cored, and sliced
  • 2 tablespoons granulated sugar
  • 1 tablespoon lemon juice
  • 1 teaspoon ground cinnamon
  • 1 tablespoon cornstarch (US) / cornflour (UK)

Instructions:

  1. Prepare the Streusel: Combine flour, sugar, cinnamon, and salt in a bowl. Cut in cold butter using a pastry blender or your fingertips until the mixture resembles coarse crumbs. Chill in the refrigerator.
  2. Make the Cake Base: Cream together softened butter and sugar until light and fluffy. Beat in eggs one at a time, then stir in vanilla extract.
  3. Combine Dry and Wet Ingredients: In a separate bowl, whisk together flour, baking powder, and salt. Gradually add the dry ingredients to the wet ingredients, alternating with the milk, beginning and ending with the dry ingredients. Mix until just combined. Do not overmix.
  4. Prepare the Apple Filling: In a large bowl, toss sliced apples with sugar, lemon juice, cinnamon, and cornstarch.
  5. Assemble the Cake: Preheat oven to 350°F (175°C). Grease and flour the springform pan. Spread the cake batter evenly into the prepared pan. Arrange the apple slices evenly over the batter.
  6. Add the Streusel: Crumble the chilled streusel topping evenly over the apples.
  7. Bake: Bake for 45-55 minutes, or until a wooden skewer inserted into the center of the cake comes out clean.
  8. Cool: Let the cake cool in the pan for 10 minutes before releasing it from the springform pan. Transfer to a wire rack to cool completely.