Non-powdery gluten-free recipes for cake and pastry

M,y niece is gluten-intolerant and, though trying cake and pastry recipes (shop-bought and home-made from scratch) , she says they have a powdery texture. Has anyone got anything they would recommend?

The only cakes I would recommend are flourless chocolate cakes and roulades.

I have not yet found a pastry recipe that is good.

I have a recipe for chocolate and Brazil nut flour less cake if she doesn't have a nut allergy.

I will post it if you want it. 

I've had real success with Delia's all-in-one sponge using Asda GF Self-raising flour recently.  My dad can't tell the difference from real flour, my OH loves it and my sister, too.

Ground almonds are always good!
C