Ingredients:

  • 3 lbs Granny Smith and Honeycrisp apples, cored and sliced 1/4 inch thick
  • 1/4 cup granulated white sugar
  • 1 tbsp lemon juice, freshly squeezed
  • 1 tsp ground Saigon cinnamon
  • 1 tbsp cornstarch
  • 1 cup old-fashioned rolled oats
  • 1 cup all-purpose flour
  • 1 cup light brown sugar, packed
  • 1/2 cup unsalted butter, chilled and cubed
  • 1/2 tsp kosher salt
  • 1/2 tsp ground cinnamon

Instructions:

  1. Preheat your oven to 350°F (180°C).
  2. In a large mixing bowl, toss the sliced apples with granulated sugar, lemon juice, 1 tsp cinnamon, and cornstarch until every slice is evenly coated.
  3. Transfer the apple mixture to a 9x13 inch ceramic or glass baking dish, leveling the fruit to create an even base.
  4. In a medium bowl, whisk together the flour, oats, brown sugar, salt, and 1/2 tsp cinnamon.
  5. Add the chilled, cubed butter to the dry ingredients. Use a pastry cutter or your fingertips to rub the butter in until the mixture resembles coarse crumbs with pea-sized lumps remaining.
  6. Evenly distribute the oat topping over the apples and bake for 40 minutes until the topping is golden brown and the fruit juices are bubbling.