I was given a book for my birthday and at the weekend I managed to finally try out the first recipe from it for a friends birthday! Peek-a-boo Cakes lists 28 different recipes of cakes that have some kind of surprise inside. I went for a relatively easy idea as I didn’t want to run before I could walk!
I made four 20cm sponges using a 6 egg/350g butter/flour/sugar mix. The recipe calls for 18cm tins but I only had 20cm, but this mix still worked well. I had also seen this ASDA recipe which uses the same quantities but in three 20cm tins, which you then cut in half to make 6 layers, so there are different options that you can go with! The Peekaboo recipe makes a lemon cake with lemon buttercream, but I chose a plain vanilla sponge using some good quality vanilla extract.
I chose Smarties as my filling of choice, with a salted caramel buttercream using Sugar and Crumbs icing sugar. It really smelt delicious as I was mixing the buttercream together! (I used 350g icing sugar – 250g flavoured icing sugar and 100g plain icing sugar, and 182g butter, which was just enough to cover and fill the cake at all the layers – I would up it to 400g icing sugar if you want to have a generous even layer).I also had some salted caramel marshmallows from The Marshmallow Lady in Edinburgh which I had ordered in her sale – which is still on! (I ordered a few flavours – our favourite is the passionfruit -closely followed by the lemon souffle!). I hadn’t actually planned to have all this salted caramel – in fact I hadn’t thought that closely at all about my fillings for the sponge layers – but it worked really well! If I did it again though, I’d choose a different sponge recipe as it was a little dense. I also would perhaps alternate jam and buttercream to give a little fruity taste to break up the sweetness of the buttercream.