Thanks everyone!
When I have treats like that, I usually do just have a tiny portion & then give the rest away or put it away & have some more the next day, etc. But for whatever reason yesterday, I just wolfed the whole thing.
What bothers me about it is that I have been a binger in the past & I'm trying very hard to leave that "in my past." I know I can eat this way (counting calories) for the rest of eternity, because I'm not depriving myself of any food I like. And yesterday was just...weird. I wasn't hungry and I wasn't even having one of those crazy*** cravings that occasionally smacks me upside the head. Nope - no real excuse at all! -It was just THERE. Convenient. Ugh.
And I felt SO BAD afterward! - I mean physically felt bad. All that SUGAR. Blech! I felt sluggish & headachey.

And no, I certainly DIDN'T feel like working out last night.
I felt the need to "protein up!" so I had a steak. With steamed veggies- which was a good choice. I felt better having ate it.
I feel better today. And no more german chocolate to get me off track.
Thanks to you all for your responses & support!!!