Easy old school sprinkle cake is a delicious retro recipe, vanilla sponge topped with sweet white icing and a whole load of fabulous sprinkles. A super easy traybake that is as much a favourite with adults and children alike.
Preheat oven to 180℃ electric - 160℃ fan or Gas Mark 4
Put all the ingredients apart from the icing sugar and sprinkles into a large mixing bowl and beat with an electric whisk or mixer for a few minutes until it goes pale in colour.
Bake for 40 minutes until golden and springy to the touch.
Meanwhile mix the icing sugar and water together in a bowl with a whisk. It needs to be a thickish consistency but spreadable enough.
More dolloping required here but this time onto the sponge.
spread with a flat spatula until smoothish. It can be a bit tricky here as you need to be careful to not lift the cake crumbs from the surface so that they mix with the icing. It can be helpful here to use a smoothing action rather than spread and lift the spatula. If the icing is too thick this will happen so try a tbsp on the cake first to check that you have the right thickness before you begin.
sprinkle the sprinkle out of the beautiful white icing whilst it is still wet.
Leave to set for a couple of hours and then cut into suitable sized squares.
Notes
make sure butter and eggs are at room temperature
measure out all your ingredients before you start
line your tin ready
try a tester dollop of icing to make sure it is not too thick or thin in the spreadable department
Add a tsp of extra milk if you need to make it thinner or some extra icing sugar if it's too thin
use a smoothing action with your spatula without lifting it up at all to keep the crumbs from the top of the cake from mixing into the icing.
make sure fully cool before icing
let the kids go wild with the sprinkles for maximum childishness