IF you want to make that smoothie high calorie, then I would make yogurt out of half and half, that's got lots of fat in it. And if you can get it locally, or organic, you don't have to worry about the fat so much. It'll be good for you. Coconut oil is a great addition. For those who have been on the SCD for a long time, you are allowed to use Coconut milk. I used to do a smoothie like this
One cup Coconut milk
one/or two eggs
honey, ice, whatever else. It's a good one.