pebble

Bob, I make a thick milkshake, but i dont use yogurt, basically though same recipe as above.

ice cream
milk
ice cubes
flavorringg

just start out with something like 4-5 scoops of ice cream, a handfull of ice, flavoring or chopped fruit......and cover with milk, whirl....whirl.....whirl.....
take a look at the consistency, is it as thick as you would like? not thick enough? add more ice cream....too thick? add some milk. (add a couple of bananas for a delish banana milk shake...)

I bought those things from the market for instant milk shake, but havent tried it yet. I had brought back some smoothie mixes, I have been using them.

Good luck Bob, hope they turn out good.

just be sure you try to make them before your friend comes....