Two of my three kids are not breakfast eaters. I am one of those die hard "breakfast is the most important meal of the day" people.
Here is what I came up with in my desperation;
2-3 TBSP of whole flax seed
I use my magic bullet and the flat grinding blade to grind that down.
1 cup vanilla yogurt
2 TBSP peanut butter
4 TBSP chocolate milk mix
2 TBSP cocoa
2 large handfuls of baby spinach leaves (They drank these for 2 weeks without even knowing the spinach was in there!)
2 cups of skim or 1% milk
I blend that up until it is smooth and split it between my three kids. The kids love it and drink it down pretty fast. It has plenty of fiber, protein, calcium, etc.