I'm trying to calculate the calories in a recipe that has a marinade. Since you don't actually eat all of the marinade, how much of the calories are you supposed to count?
This is a great question and I don't think that it has an answer (well, not a perfect answer at least).
I calculate calories using a feature of The Dr. Gourmet Diet Plan, and when I am working on a recipe that calls for a marinade I assume that all of the marinade will be eaten and post those results. This can lead to an overestimate of the nutrition information, but I am not sure that some cooks won't brush the remaining marinade on the food as it cooks.
A good way for you to make the calculation on your own would be to add up the calories for the marinade separately. Estimate how much you don't use and deduct them.
Thanks for writing,
Timothy S. Harlan, M.D.