Morrisons have the Fabulous Bakin' Boys Cup Cakes at Half Price, but on top of this the chocolate ones have boxes with Reward Points. They're marked 'Great Days Out'' in the corner but you can use the reward points for different offers, some better than others. The best I think is a free Photo Collage Poster from Snapfish which normally begin at £3.99. Each box has ten points which is enough for a free Poster plus 30 free prints. Not bad fo 64p plus you get to eat six cakes.
There's a code in each box and you register your points at http://www.fabpoints.co.uk.
Look for boxes with the Great Days Out flash. The lemon flavour ones I saw didn't have this.
Will add a picture of the box later when I can upload from my camera.