Choc & Vanilla Marble Loaf Weekly Bake-Off

It’s Weekly Bake-Off time again, and it’s another chocolate-based one… perfect!

As this is part of the Weekly Bake-Off, this recipe is from Mary Berry’s 100 Cakes & Bakes.

I made a slight tweak to the method.
The method suggests that you randomly spoon the vanilla and chocolate cake mixtures into the tin to create the marble effect.
I am not sure that is how the effect in the picture accompanying the recipe was created (see below), so I layered the mixture to give a more even effect.
I know mine is nowhere near as perfect looking as Mary Berry’s, but nonetheless, I am pleased with how it turned out.

I have to be honest, I found the loaf a little dry.
The icing saves it from being too dry, but I am not sure I would use this recipe again.

Mary’s Marble Loaf…

My Marble Loaf…

Check out the other entrants’ submissions to the Weekly Bake-Off Challenge.

The Recipe



  • 225g unsalted butter, softened
  • 225g caster sugar
  • 275g self-raising flour
  • 2 level tsp baking powder
  • 4 large eggs
  • 2 tbsp milk
  • ½ tsp vanilla extract
  • 1½ level tbsp cocoa powder
  • 2 tbsp hot water

  • 25g unsalted butter
  • 15g cocoa powder
  • 1-2 tbsp milk
  • 100g icing sugar, sifted
  • about 25g white chocolate, melted


Preheat the oven to 160°C.
Grease and line a 2lb loaf tin with baking parchment, or use a loaf tin liner like I did – super quick and easy!

Measure the butter, sugar, flour, baking powder, eggs, milk, and vanilla extract into a large bowl and beat until well blended.
Divide the mixture into 2 bowls.

In a small bowl, mix the cocoa powder and hot water together until smooth. Allow to cool slightly, then add to one of the bowls of cake mixture, mixing well until evenly blended.

Spoon one third of the chocolate mixture into the tin and level the surface.
Spread one half of the vanilla mixture over the top, and once again level the surface.

Repeat these steps, until all the mixture is used.
You should have one layer of chocolate, then vanilla, then chocolate, then vanilla, then chocolate on top.

Bake for 50 minutes to 1 hour. A fine skewer inserted into the centre of the cake should come out clean.

Allow to cool in the tin for a few minutes, then turn out onto a wire rack, peel off the parchment/loaf tin liner, and leave to cool completely.

To make the icing, melt the butter in a small non-stick pan, add the cocoa powder, stir to blend, and cook gently for 1 minute.
Stir in the milk and icing sugar, remove from the heat and mix thoroughly.
Spread the icing mixture onto the cold cake.
Drizzle with the melted white chocolate, and leave to set.



4 thoughts on “Choc & Vanilla Marble Loaf Weekly Bake-Off

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