Preheat the oven to 180°c (160 fan/ Gas 4/ 350F) and lightly grease a 1.5-2 litre baking dish.
For the sponge, cream together the butter and sugar until pale and fluffy using a wooden spoon.
125 g Butter, 125 g Golden Caster Sugar
Beat in the eggs and vanilla extract.
2 Eggs, 1 teaspoon Vanilla Extract
Fold in the flour until all of the ingredients are combined. Set aside whilst you stew the apples.
125 g Self-Raising Flour
Place the chopped apples, lemon juice and water in a large saucepan and cook on a medium heat for 7-8 minutes until the apples turn soft and mushy.
750 g Bramley Apples, 1 tablespoon Lemon Juice, 2 tablespoon Water
Stir in the caster sugar and cinnamon then spoon the apples into the prepared baking dish.
3 tablespoon Caster Sugar, 1 teaspoon Cinnamon
Top the apples with the vanilla sponge and bake in the oven for 30-35 minutes until the sponge is golden brown.