Frosted Walnut Layer Cake

by Aug 22, 20150 comments

Frosted Walnut Layer Cake

This is the recipe for Mary Berry’s frosted walnut layer cake..  I noticed that it’s basically a Victoria sponge cake base with walnuts in it. I had fun with the recipe and I had no trouble with the caramel at all like some people seem to have. I hope you have a lot of fun baking this gorgeous looking frosted walnut layer cake.

I have decided to bake most, if not all the technical challenges of the Great British Bake Off Series 6.  I am a bit behind with my challenges due to other commitments but I hope to be able to bake all of them by the end of the series.

The recipe is exactly as it appears on the Great British Bake off Website.  I did not have cream of tartar so I left it out.

For the frosted walnut layer sponges:

225g self-raising flour,
1 tsp baking powder
100g walnuts, finely chopped
225g butter, softened, plus extra for greasing
225g caster sugar
4 large eggs, beaten

For the caramelised walnuts:

2 tbs water
100g caster sugar
10 walnut halves

For the buttercream:

125g butter, softened
½ tsp vanilla extract
2 tbsp milk
250g icing sugar

For the boiled icing:

2 large egg whites
350g caster sugar
4 tbsp water
¼ tsp cream of tartar

1.  Preheat the oven to 160C/fan 140C/Gas 3. Grease 3 x 20cm sandwich tins and line the base of each tin with baking parchment. Mix the flour, baking powder and walnuts together in a bowl.

2.  In a separate bowl, cream the butter and sugar together until pale and fluffy. Beat in the eggs a little at a time.

3.  Fold in the flour mixture using a large metal spoon.  Divide the mixture equally between the 3 tins and level the surfaces.

4.  Bake in the pre-heated oven for about 25-30 minutes until the walnut cakes are golden and springy to the touch. Leave to cool in the tins for a few minutes then turn out, peel off the parchment and finish cooling on a wire rack.

5.  For the caramelised walnuts, tip the sugar into a pan and heat over a low heat until the sugar is beginning to melt.  Increase the heat and cook the caramel to a dark golden colour.  Remove from the heat, add the walnut halves and swirl to coat in the caramel.  Transfer the walnut halves onto a silicon sheet and leave to set.


6.  For the buttercream, put the butter, vanilla extract, 1 tablespoon of the milk and half the icing sugar in a large bowl and beat until smooth.  Beat in the remaining icing sugar and pour in the rest of the milk if needed, to make the buttercream the right consistency.

7.  Spread half of the buttercream over one of the walnut cake sponges and place the second sponge on top.  Spread the remaining buttercream over the second sponge and top with the third walnut cake sponge.

8.  For the boiled icing, measure the egg whites, sugar, water and cream of tartar into a bowl set over a pan of hot water and whisk for 8-10 minutes until thick.

9.  Cover the top and sides of the walnut cake, swirling the icing to form softened peaks. Work quickly as the icing sets rapidly. Leave to set in a cool place, but not in the fridge. Decorate with the caramelised walnuts.

Serve and enjoy the frosted walnut layer cake!


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