congrats Puffer, it is always hard to say no to something the first time, but each time we say it our resolve gets stronger and the easier it becomes!!
I have posted a Sticky Date Pudding recipe for you (a low fat one)should you want to still "have your cake and lose weight too!!" If you find it to be too high in the sugar department, just cut the brown sugar down by 1/2 again.
Happy slimming mate and again a big well down for standing up for yourself!! Friends can be a bit of a challenge sometimes, but you stick to your guns.