No-fat brownie

I looked at the low number of cals and figured as a test of my not-binging, i would make something to take to friend's house. I've made a no-fat brownie (and didn't even eat much mixture, maybe 50 cals worth? Up to 623 I think), from this recipe. However, I had no eggs, so used arrowroot starch and water. I think I'll also cut it up into mini pieces, so that other people eat it all. If I can get away with only one piece, maybe that'll be another 50 cals? It's pretty low on cals anyway.