What has been your favorite substitution or screw up with your grocery pick up or deliveries? My favorite substitution was Chive Whipped cream instead of plain. I got a pretty good mix up in my favor. I ended up with part of someone else's order. I called them, because it was kind of pricey, and they said keep it. So I did. I just learned how to cook scallops. So what have your favorite mix ups been?