My mum is extremely patriotic and although she spent her life travelling back and forth to Germany with my Grandad and Nan in the army she always resumed the fact that Britain was the best place to be. I chose this cake as the this well known British cake is the perfect cake for her as to me it brings both the German and the British ties that both my mum and the royal family have together. Plus i lovely the thoroughly modern patriotic twist! I know right now she is planning her own Jubillee party for all my family and i‘m sure she would love to have this Batternburg at the head of the table!!
Preheat the oven to 190C/375F/Gas 5. Grease and line an 8in square cake tin.
Beat together 175g of the butter and the sugar in a bowl until light and fluffy. Beat in the eggs, a little bit at a time, until well mixed. Fold in the flour. Gradually add a few drops of blue food colouring to the colour is what you want.
Spoon the batter into the cake tin and level out using the back of a spoon. Bake for 35-40 minutes, or until golden-brown. Use a skewer to check if it is done, insert it into the middle. If it comes out clean, you are good to go.
Remove the cake from the oven, set aside to cool for five mins, then turn out and cool, upside down, on a wire rack.
To make the buttercream filling, beat the rest of the butter in a bowl until soft and smooth, then slowly beat in the icing sugar. Continue to beat until fluffy.
To assemble the cake into the flag shape, slice the cake in half lengthways. Then place one half of the sponge on top of the other and trim off the edges,so that both cakes are the same size.
Cut the cakes in half again lengthways. You should end up with four long rectangles. These will make the cross section of your cake, like a regular battenburg cake.
To make the diagonal cuts like a union jack, slice each rectangle diagonally along the length to make two triangular cakes. You shoud end up with 8 triangles all together.
Take 2 of the triangles that you cut from one block. Spread each cut side of the triangles with buttercream and jam and sandwich together with the other triangle to put it back into a rectangle bock. You should see the jam and cream running diagonally along the block. Do the same for the other 6 triangles to create another 3 rectangle blocks. Wrap each rectangular block in clingfilm and chill in the fridge for at least an hour.
To create your flag shape, stack the rectangular blocks into a square with the diagonl lines running from ech corner into the middle, so that the cross-section resembles a Union Jack .
Make the bottom half of the flag first by spreading each of the long inside edges with buttercream and jam and sandwiching together. Repeat with the top of the flag. You should have a line of jam nd cream now running down the centre from top to bottom. chill both layers for one hour.
Finally, sandwich the top and bottom together by spreading the top of the bottom layer and the bottom of the top layer with buttercream icing and jam. Sandwich together. you should now have the horizontal line hunning through the centre to finish off the cross shape. Chill the cake for one hour.
While the cake is chilling, roll the marzipan out on a surface dusted with icing sugar till it is around 5mm thick and should be large enough to cover the cake.
When the cake has chilled, warm a little strawberry jam and use this to brush the outside of the cake. this will help the marzipan to stick to the cake.Turn the cake upside down on the marzipan and brush the bottom of the cake with the jam.
Carefully, wrap the marzipan around the cake, pressing it gently onto the surface of the sponge, and press the edges together to make a firm seam. Turn back over so that the seam is now underneath, trim a thin slice off each end and place on a serving plate. Take a slice from each end of the cake to neaten the edge and it should reveal a patriotic union jack, fit for the queen herself.
If the mixture after adding the eggs looks like it is curdling add a spoonful of the flour.
When adding blue colouring, don’t add too much or the cake will look green.
When stacking the blocks together to mke the flag shape, use an image of the Union Jack as a guide.
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