Peel and chop the cooking and eating apples roughly, no larger than 2cm (or just under 1 inch) chunks and place in a saucepan.
1 kg (2.2 lbs) cooking apples, 300 g (10.5 oz) eating apples
Squeeze, or pour, over the lemon juice. PRO TIP: This is to help stop the apples from browning.
1 tbsp lemon juice
Add the caster sugar and the cinnamon to the apples and give everything a stir.
3 tbsp golden caster sugar, 1/2 tsp ground cinnamon
Place the pan on the hob (stove top) over a medium heat and cook for 10-15 minutes stirring a couple of times, until the apples start to break down.
Whilst the apples are cooking, make the crumble topping. Add the flour, oats, sugars, and salt to a bowl and mix everything together until combined.
240 g (2 cups ) plain (all-purpose) flour, 60 g (2/3 cup) rolled oats, 60 g (1/3 cup) soft brown sugar, 60 g (1/3 cup) golden caster sugar, 1 pinch salt
Add the cold butter and rub the mixture with your fingers until the butter starts to look like breadcrumbs and is starting to form clumps. .
120 g (1/2 cup) chilled unsalted butter
By now the apples should be starting to break down. Carefully pour the apple filling mixture into a baking dish.
Add the crumble topping to the baking dish and spread on fairly evenly.
Place in the preheated oven and cook for 25-30 minutes until golden and bubbling.
Remove from the oven and leave to cool slightly before serving with your favourite ice cream or homemade custard.
Notes
Ingredients swaps
You can replace half the apples with rhubarb, pear, or blackberries for a different option. This is quite a forgiving recipe and you can mix up the filling with fruit that you've got in.Nutritional information is approximate, per serving, based on this recipe making 6 portions.