Preheat the oven to 350°F (180°C/160°C Fan). Line two 8” cake tins with greaseproof paper and leave to one side.
In a large bowl, whisk together the sugar and butter until light and fluffy. Add in the flour, eggs and baking powder and whisk until all combined.
Peel and cut your apples roughly into ¼-½-inch (1cm) cubes and add to your mixture. Add your blueberries also and fold them in.
Split the mixture evenly into the two cake tins and bake in the over for 35-40 minutes. You will know they are ready when they are golden brown and springy to touch.
Leave them to cool in the cake tin for 15-20 minutes and then remove and put them on a wire rack to cool fully
Preheat the oven to 375°F (190°C/170°C Fan) and line a baking tray with greaseproof paper and leave to one side.
In a bowl add all the ingredients and rub together using your fingers until it starts to form a crumbly texture.
Pour the mixture onto the baking tray and bake in the oven for 5-10 minutes until golden brown. Leave to cool.
In a bowl mix together the butter and icing sugar until it is combined. Add in the cinnamon and mix again.
If you find the buttercream is quite thick add 1 tsp of milk at a time mixing in-between until it reaches the desired consistency. Put the mixture into a piping bag with a 1M Piping Tip.
Place your first cake on your cake board or plate. Pipe the buttercream onto the cake and add some of your crumble and blueberries.
Place your second cake on top and again cover the top of the cake with buttercream. Decorate with the remaining crumble and blueberries.
You can use any kind of fruit in this cake that you want. You could use all apples, all blueberries or a mixture of different fruit such as blueberry and raspberry or apple and blackberries. Just ensure that they fruit is the same weight as this recipe.
The cinnamon in the buttercream is completely optional. You could leave the cinnamon out and just use a teaspoon of vanilla extract instead for vanilla buttercream.
You also don’t need to use light brown sugar you could use caster sugar instead or a combination of the two sugars. So long as the quantity of sugar is 300g (1 1/2 cups).
Apple & Blueberry Crumble Cake Recipe from Slumber & Scones https://www.slumberandscones.com/apple-and-blueberry-crumble-cake/