I had no clue how to do that. Really, by ratio, by weight, by how much it looks like compared to the rest of my food. I decided to go straight up with the calories. So I added the number of calories from all non-primal foods. Today that would be the 9 chocolate covered espresso beans, 2 squares of Ritter-Sport 72% dark chocolate and a 2 tablespoons of half and half.
I then divided that total by the total number of calories I ate. It came to 9%. So, I figure it is pretty darn close :)
I realize a lot of people don't like the 20% rule. And you know what? I don't give a rats a$$. This is my life and my choice. I want to stay primal as long as possible and for me to do that and still enjoy the way I eat, it is going to include chocolate and some dairy products. That is all there is to it. I have been told I am not 'paleo' or, 'well that isn't very primal is it?' You know what? I still don't care. I am not really a caveman, we have some things in modern society I refuse to part with. Chocolate isn't the only one. I will NOT go back to sand paper toilet paper, or a leaf or some craziness. I like my Charmin thank you very much. And Bounty paper towels. You won't see me doing a lot of things our ancestors did, it just isn't happening. I like chocolate I eat chocolate. I'm not paleo, now my feelings are hurt...sniff, sniff.
Seriously, it just isn't that hardcore for me. I am reaping the benefits of the diet and the happiness my little bit of chocolate gives me.
Am I try to justify my indulgence? No, I feel no need to justify anything. I am just letting you know that some one can throw spears at me and say I am not 'paleo' or 'primal' and that is okay. I am NOT really either of those. I am me and I choose to stay me as healthy as I can, while still eating chocolate every day.