Just to let you know, I made some really good "fake" chocolate brownies tonight. Using just oat bran, low fat chocolate powder , low fat yogurt and a little bit of sweetener. Really you need waitrose essentials low fat milk chocolate powder, as I tried with a different brand and they were too bitter.
Oat bran + chocolate powder (2:1 ratio)
Mix well.
Slowly add skimmed milk until firms a past. Basically until there is no dry ingredients but the mixture is a thick paste and holds it's shape when spooned onto a surface.
Put in baking tray and flatten out.
Cook in oven for 10 ish mins, untill it feels "springy to touch".
Whilst cooking add chocolate powder and sweeterner to yogurt and mix well. I just kept adding until it tasted nice!
Remove tray from oven and slice into strips, use a spatula to remove onto a plate.
Smooth over yogurt mix (fake icing!) and slice across, to give small squares.
Slightly separate squares and chill for a couple of hours.
Sorry measurements arent exact, but just keep adding to taste.
If you add too much milk (like I did) just add some mire oat bran to firm it up!