I always did have a thing for Marg's recipes, and it's probably because we both love the same things. The chocolate and orange flavor combination is proof that God exists, and these brownies are even further proof! I needed these to be non-dairy, so I used a full cup of margarine instead of the shortening/butter combo in the recipe, and with margarine also in the icing, that was the only change I made. Using the Microplane made the best zest and I also think that one cup of cocoa didn't hurt either! ;-) I lined the pan with parchment paper, and the brownies just lifted out for easy cutting. Mmmmmm, Marg, thanks for this one!