Apple sour cream cake

We love apple cakes, and as there were a few wrinkly apples to use up, I found this recipe in my binder; it's one I've not tried before.
Anything with cinnamon is a winner with me, and if it's easy to make, it's a double winner! The other good thing about this cake is that it freezes well [or so the recipe says].

2 large apples, peeled and cored [ I used 3 Royal Gala]
125g butter or margarine, softened
125g caster sugar
2 eggs
1 tspn vanilla extract
200g plain flour
11/2 tspn baking powder
1 tspn cinnamon
100g sour cream or creme fraiche - I used creme fraiche
1 tbspn apricot jam

Preheat oven 180C/gas4
Grease and line a 23cm tin.

Beat the butter and sugar together till white and fluffy, then beat in the eggs.
Add the baking powder and cinnamon to the flour and fold into the mixture, then add the vanilla and sour cream or creme fraiche. Mix together gently till smooth.
Chop 1 of the apples into chunks and add to the mixture. Slice the other one.
Spoon the mixture into the tin and smooth. Arrange the apple slices on top.
Bake for 35-45 mins till golden.
Cool on a wire rack.
Heat the apricot jam gently then brush onto the cooled cake.

We're having some of this as a dessert tonight, then I'm going to freeze the rest as we're away for the weekend.