I bought some coconut flour from an asian shop in my nearby city. Its about a 40 min drive, but I got 1kg for only £2.99 thats less than half the price online, before carriage. Well worth a drive, and as its lasting ages, I probably wont have to go again till the new year. Their ground almonds were abit cheaper than tescos too. I paid something like £6 for 1kg. Not cheap but again they last a while.
I really like the 3 minute microwave cake I found on here somewhere;
2 tbsp butter, melted,
2 eggs
2tbsp ground almonds/ or 1 heaped of coconut flour
2 tbsp of cocoa powder
2 tbsp of sweetner
2 drops vanilla essence
1/2 teasp baking powder
melt the butter, allow to cool a bit then whisk in eggs, then whisk in the rest, bung in the microwave for about 3 minutes. I use an old plastic takeaway tub, perfect size.
Sometimes I replace the cocoa with dessicated coconut and add a few glace cherries. Or you could use orange flavouring instead of the vanilla. Loads of possibilities.