Equipment
Method
- Granny Smith or Braeburn apples - 6 medium (∼900g / 2 lbs)
- Caster sugar - 3 tablespoons
- Plain flour - 2 tablespoons
- Ground cinnamon - 1 teaspoon
- Ground nutmeg - 1/4 teaspoon
- Lemon juice - 1 tablespoon
- Vanilla extract - 1/2 teaspoon
- Plain flour - 150g (1 1/4 cup)
- Cold unsalted butter, cubed - 100g (7 tablespoons)
- Light brown sugar (packed) - 80g (1/3 cup)
- Rolled oats - 80g (1 scant cup)
- Fine salt - 1/4 teaspoon
- Ground cinnamon - 1/2 teaspoon
Notes
- Cold butter is non-negotiable — return it to the fridge for 10 minutes after cubing if your kitchen is warm. This is what gives you the crunchy topping.
- Do not skip the flour in the filling — it thickens the apple juices into a light sauce. Without it, the filling turns watery and the topping steams rather than crisps from the underside.
- The bubbling is the doneness signal — pale topping with no bubbling means the apples are still cooking. Golden topping with active bubbling at the edges means it is done.
- Make ahead: Assemble up to 24 hours ahead, refrigerate, and bake straight from the fridge with 5 to 8 extra minutes added to the bake time.
- Storage: Room temperature up to 2 days (loosely covered). Refrigerator up to 4 days. Freezer up to 3 months unbaked or 2 months baked.Instructions Heat oven to 180°C / 350°F (fan 160°C). Lightly butter an 8×8 inch baking dish. Combine apple slices with sugar, flour, cinnamon, nutmeg, lemon juice, and vanilla in a large bowl. Toss until every slice is evenly coated. Spread into the prepared dish in an even layer. Combine flour, brown sugar, oats, salt, and cinnamon in a separate bowl. Add cold butter cubes. Rub with your fingertips until the mixture resembles coarse, uneven breadcrumbs with pea-sized butter pieces throughout. Do not over-rub. Scatter the topping loosely and evenly over the apple layer. Do not press it down. Bake for 40 to 45 minutes until the topping is deep golden-brown and the filling is bubbling at the edges. Rest for 10 minutes before serving.