Four layers of the lightest, fluffiest cake filled with blackcurrant jam, custard powder buttercream and cinnamon apple compote. Perfect as pudding in autumn or slice thinly for an afternoon treat ;) Serves a minimum of 8 generously
Grease and line two 8-inch round sandwich tins. Set the oven to 170˚C for conventional ovens, 10-20˚C lower for fan assisted ovens.
Beat the butter, sugar and vanilla together until very light and fluffy then beat the eggs in one at a time.
Sift the flour, raising agents and custard powder over the creamed mixture and fold in stopping just before the flour is completely folded and adding in the buttermilk.
Divide between the tins and bake for 25-30 mins until well risen and browned. It should spring back when pressed in the middle and a skewer comes out clean. Note because of the custard powder, this cake browns faster and more than an ordinary Victoria sponge cake. Cool on a rack for 10 mins before turning out of the tins to finish cooling.
Beat the butter, icing sugar and custard powder together until light and smooth then dribble in a little recently boiled water to soften the frosting further. Add it 1 tsp at a time - about 1 tbsp is usually just right.
If liked, pop it in a piping bag with a star tip like a Wilton 1M or 2D and put to the side until the cakes are cold.
Peel and chop the apple into small dice then put in a saucepan which has a lid with the sugar, cinnamon and a splash of water. Cook over medium-high heat with the lid on for 5 minutes then take the lid off and stir well. Either continue to cook for another 5 minutes until the compote is completely smooth or if liked, leave it like this with a few small chunks remaining for texture.
Transfer to a shallow dish to cool. Leave it uncovered to allow for excess moisture to evaporate away.
Use a serrated bread knife to split the cold cakes into two thinner layers. Or use a cake leveller if you have one.
Place one cake on the serving plate then spread the jam on top of it. Place another cake on top. Pipe out rosettes of frosting if using a piping bag, if not, use a palette knife to spread it in a thin layer.
Top with another of the cake layers then spoon on the apple compote. Top with the final cake layer and if you have some frosting left in a piping bag, pipe little rosettes around the outside.