Want an easy peasy cake for British-themed celebrations? This Union Jack Traybake Cake is very simple to make and doesn’t require any specialist equipment or cake decoration skills. (It’s a great cake to make with kids!) But the Union Flag pattern on top makes it the perfect cake to serve at British-themed celebrations, garden parties and street parties!
Preheat your oven to 180C / 160C fan / gas mark 4 / 350F. Grease and line a traybake pan (33 by 23cm / 13 by 9ins).
In a large bowl, beat together the butter and sugar thoroughly, until the mixture starts to look a little bit paler.
Add in one egg at a time and stir until each egg is completely mixed in before adding the next one.
Add in the vanilla extract and stir to ensure it is evenly mixed in.
Add in half the flour and stir gently until mixed in. Add in the remaining flour and, again, stir gently until the flour is mixed in.
Add in the 4 tablespoons of milk and stir until mixed in.
Tip the mixture into the lined traybake pan. Smooth over the surface with the back of your wooden spoon.
Put the traybake into your preheated oven for 35-40 minutes. After 35 minutes, remove from the oven and check to see if it’s done using a skewer inserted into the centre of the cake. If the skewer comes out clean, it is cooked. If the skewer is covered in batter, return to the oven for a further 3 minutes and test again. Repeat if necessary, until the skewer comes out clean. (See Note 2.)
Allow the cake to cool in the tin for 10 minutes, then turn it out onto a cooling rack (See Note 3.) and allow to cool completely. This should take approximately 1 hour.
Union Jack Icing and Decoration
Don’t try and ice the traybake cake until it is completely cold! For best results, decorate just before serving. (See Note 4.)
Put the softened butter, vanilla extract and sieved icing sugar in a bowl and beat together until smooth.
Trim off the top of the cake, if necessary, so you have a nice flat surface to work with.
Using a knife, smooth the icing over the top of the cake as evenly as possible. (It doesn’t matter if it’s not perfect!)
Finally, use the blueberries, raspberries and strawberries to create a Union Jack pattern on the top of the cake. Use strawberries for the red vertical/horizontal cross, raspberries for the red diagonal cross, and blueberries to fill in the gaps to make the blue background.
You may want to consider buying slightly more berries than stated in the recipe, in case not every berry is usable (I often find there are a few berries in every pack which are too soft or the wrong shape!)
If you don’t own a skewer, you can use the handle of a teaspoon, a chopstick or a toothpick instead!
If you don’t own a cooling rack, you can use the rack from your grill instead – or anything that allows air to flow under the cake.
Because you are using fresh berries on this cake, it is best to decorate the cake as near to when you want to serve it as possible. This cake is best eaten as soon as possible after you have decorated the cake.
Suitable for freezing.
Nutrition information is approximate and meant as a guideline only.