Nestle Nido, 1/2 cup, and 2 packets of carnation instant breakfast. Add 2 cups of cold water, enjoy.
I often times have instant breakfast in the mornings when I'm not hiking, so it seemed only natural to do the dry milk/instant breakfast thing while hiking.
I'd recommend having a bottle that's more than 16 oz so there's enough air in there to have some shaking room while you're mixing it up. 750 ml water bottles work well.
It's nice to be able to mix one of these up, take a few swigs, and shove it in my pack's side pockets for consumption as I walk. Spreads the carbs out to sustain energy, and saves time ordinarily wasted in camp cooking/eating/cleaning up.