Homemade Mayonnaise - Bring out the (very) best!

How do you figure out the calories for the whey? I'm thinking of making this for myself for sammiches, and I want to put it on my recipe list. But I'm a little unsure of how to figure that out.

Hmm - I'm not sure. I didn't bother to add it to the recipe myself because there's so little of it in each serving. But I found this info on self.com; I'm sure you could enter it in MFP and it would be a good guess: http://nutritiondata.self.com/facts/dairy-and-egg-products/100/2

Bear in mind that this info is for 1 cup (8oz) of whey, and 1 cup = 16 Tablespoons. Don't forget to convert for your recipe!

How do you get 40 cals per Tbsp? If you are adding 10 Tbsp (2/3c) of oil, and one egg, wouldn't that be at the very least 80-100 cals per Tbsp?

I'm sorry, I just saw this post! I'm not sure about the math, but I've shared the info that I got when I entered the recipe into MFP. I'm guessing that the difference is a result of the increased volume of the finished mayonnaise. I used 2/3 cup of oils, one egg, and a Tablespoon or so of other ingredients, but the finished product is two cups. I suspect it's because of the emulsion, but I'm not positive. Here's a screenshot of the recipe in MFP: