Ingredients:

  • 6 cups peeled and sliced Granny Smith or Honeycrisp apples
  • 1/2 cup granulated sugar
  • 1 tbsp ground cinnamon
  • 1 tbsp lemon juice
  • 2 tbsp cornstarch
  • 1 cup old-fashioned rolled oats
  • 1 cup all-purpose flour
  • 1 cup packed light brown sugar
  • 1/2 tsp salt
  • 3/4 cup unsalted butter, cold and cubed

Instructions:

  1. Preheat your oven to 375°F (190°C).
  2. Toss the sliced apples, granulated sugar, cinnamon, lemon juice, and cornstarch in a large bowl until every slice is evenly coated.
  3. Pour the mixture into a 9x9 inch baking dish, spreading them evenly to ensure consistent cooking.
  4. In a medium bowl, whisk together the oats, flour, brown sugar, and salt.
  5. Add the cold, cubed butter to the dry ingredients.
  6. Use your fingertips or a pastry cutter to rub the butter into the flour mixture until it resembles coarse crumbs with some pea-sized lumps remaining.
  7. Sprinkle the topping evenly over the apples, pressing down very lightly.
  8. Place the dish in the center rack of the oven and bake for 40-45 minutes until the topping is a deep golden brown and the apple juices are bubbling thick and slow around the edges.
  9. Allow the dish to cool for 10 minutes before serving to allow the juices to set into a syrup.