Ingredients:

  • 1 ½ cups (192g) all-purpose flour, plus more for dusting
  • ½ cup (100g) granulated sugar
  • ½ teaspoon salt
  • ¾ cup (1 ½ sticks / 170g) unsalted butter, cold and cubed
  • 1 large egg yolk
  • 2 tablespoons (30ml) cold water
  • 4 medium apples (about 2 lbs/900g), peeled, cored, and diced (Granny Smith, Honeycrisp, or Gala work well)
  • ¼ cup (50g) granulated sugar
  • 2 tablespoons (30ml) lemon juice
  • 1 teaspoon ground cinnamon
  • ¼ teaspoon ground nutmeg
  • 2 tablespoons (30ml) all-purpose flour
  • ½ cup (60g) all-purpose flour
  • ½ cup (50g) rolled oats (not instant)
  • ⅓ cup (67g) packed light brown sugar
  • ¼ teaspoon salt
  • ½ cup (1 stick / 113g) unsalted butter, cold and cubed

Instructions:

  1. Line the 9x13 inch baking pan with parchment paper, leaving an overhang for easy removal.
  2. Combine flour, sugar, and salt in a bowl or food processor. Cut in the cold butter until the mixture resembles coarse crumbs. Add the egg yolk and water; mix until just combined. Press the dough evenly into the prepared pan. Chill for 15 minutes. Bake at 350°F (175°C) for 12-15 minutes, or until lightly golden.
  3. Combine diced apples, sugar, lemon juice, cinnamon, nutmeg, and flour in a large bowl. Stir to combine.
  4. Combine flour, oats, brown sugar, and salt in a bowl. Cut in the cold butter until the mixture resembles coarse crumbs.
  5. Spread the apple filling evenly over the pre-baked crust. Sprinkle the crumble topping evenly over the apple filling. Bake at 350°F (175°C) for 35-40 minutes, or until the topping is golden brown and the filling is bubbly.
  6. Let cool completely in the pan before lifting out using the parchment paper overhang. Cut into bars.