Gluten free cake

[cantthinkofausernamerightnow]

I am about to make a gluten free cake (preferably a layer cake) for someone who has coeliac disease.
I need it to look suitably celebratory and taste yummy.
Any favourite recipes you's like to share?
TIA

[Scrowy]

Marks and Spencers sell GF baking powder in their free from section if people struggle to find it elsewhere.