How can I reliably turn a shop-bought cake purple?

[Frankie789]

I’m wanting to make a shop bought cake that’s one of those DIY / Decorate yourself purple, how can I do it? Would an edible glitter spray work? If so any recommendations? I have one chance to do it so needs to be relatively reliable though not overly fussed if it’s patchy to be honest.

Thanks all!

ill try buying a naked one and wrapping rolled icing on to it, failing that a white one would have to do!

You can paint on to white roll out icing with purple gel food colouring which has been watered down a bit. I have done it. You wont get very even coverage without a sprayer but it will be fine for a kids bday

I would say buy the M&S buttercream one and then add different purple sweets and buy a purple cake topper!

another thing I like to do is buy white chocolate fingers and put them around the cake and then add a bow around the cake 💜

Or put purple fondant over the buttercream?
I’d recommend using gloves when working purple food dye into white fondant, I speak from experience!

Naked cake and purple ganache, it’s more forgiving and tastier

Get some purple
smarties to decorate a white cake?

I'd just use a cake collar

Purple fondant- roll it out, slap it on, smooth it over. Dead easy.