A couple of years ago a tutorial from The Cake Blog appeared in my Pinterest feed for a DIY Rainbow Sprinkle Cake. Of course I pinned it straight away, but in true Cath fashion, it has taken a couple of years to actually have a go at it.
I did not make the cake in rainbow colours as Kate from The Greedy Baker did in the tutorial as I was going to have five macaron colours to match the cake (however in the end, I only ended up with two) but as there would be a few gluten intolerant folks consuming this cake I converted my favourite vanilla cake recipe into a gluten-free version so no one was left out.