I spotted these on Seriouseats.com this week and couldn't resist (they're originally from the bakery Baked). We enjoyed them at our office Halloween party. Recommendation: Eat them fresh -- they lose their punch when they sit overnight in the fridge and can get too wet. Expect a denser, cake-like cookie and not the usual fluffy chocolate whoopie pie. To up the orange color, maybe mix in some food coloring to the icing or add colored sugar to the edges.