Thanks @porkchop and @jimrmaine.
We’ve brewed this exact recipe in the past and are nearly positive it wasn’t this dark. Granted, it was a few years ago, so our memory may be a little off!
The packaging slip had the correct grain amounts on it, but I’m thinking NB inadvertently measured out 2x the amount of dark grains. The recipe calls for .25lb of Chocolate Malt for a 10 gallon batch, but it looked like there was at least half a pound or more in there!
That may also explain why our efficiency was so high because we were calculating with less grains in the mash than there actually were.
Thanks.