Apple Cake with Hazlenut Caramel Topping

Serves: 10
Ingredients
• 200g skinless hazelnuts
• 200g butter at room temperature
• 200g caster sugar
• 3 medium eggs
• 4 tbsp yogurt
• 200g self raising flour
• ½ tsp baking powder
• 1 ½ apples cored and cut into thin slices (each ½ into 16)
• 2 tsp icing sugar sifted
• 75g butter
• 75g soft light brown sugar
• 3 tbsp double cream
• 85g hazelnuts roughly crushed
• ½ apple cored and sliced into thin wedges

Method
Preheat the oven to Gas Mark 4/180C/fan oven 160C. Lightly grease a square loose bottomed 20×7.5 cm cake tin and fully line with baking parchment. Finely grind the hazelnuts in a mini processor. Put the butter and  sugar in a bowl and cream together with a wooden spoon. Whisk in the eggs and yoghurt until fluffy. Sift the flour and baking powder together and fold in with the ground hazelnuts. Fold in the sliced apples and spread the  mixture evenly into the tin. Sift over the icing sugar. Put the tin on a baking tray and cook for 1hour. Meanwhile prepare the topping. Put the butter, sugar and cream into a small pan and melt together. Stir in the nuts and fold in the apple. Spread the mixture over the cake when it has cooked and put back in the oven to bake for a further 10-15 minutes. Put the tin on a wire rack to cool. When still warm lift out of the tin and serve warm  or cold.