Preheat oven to 180 degrees C (fan).
Peel, core and slice the apples and arrange in a baking dish.
800-900 g Bramley (cooking) apples
Sprinkle over the caster sugar and cinnamon.
60 g caster sugar (superfine sugar), ½ tsp cinnamon
In a mixing bowl, cream together the butter and caster sugar.
110 g butter, 110 g caster sugar (superfine sugar)
Add the eggs and flour and beat well until combined.
2 medium free-range eggs, 110 g self-raising flour
Add the baking powder and vanilla extract and mix in.
1 tsp baking powder, 1 tsp vanilla extract
Spoon the sponge mix over the prepared apples, smoothing it down with the back of a wooden spoon. Don't worry too much about covering all the apples, the sponge will spread as it bakes.
Bake for 30 to 35 minutes until golden brown and risen. Dust with icing sugar and serve with cream, custard or ice cream.