Well, if we can make dairy-free ice cream, then we also can make dairy-free milkshakes. I have a very simple recipe to make shakes, but I'm sure there are more involved methods that might get better results. My kids love this.
Oh, and this is not just dairy-free, it's also soy-free. We use DariFree for the milk base -- a potato-based milk alternative.
First, start by making one recipe for my GFCF ice cream.
Freeze the ice cream and after four hours, it should be just right to make shakes. Or, after freezing, let it sit out for at least 30 mins, maybe more, to soften enough to make shakes.
I make chocolate, so you could use Hershey's cocoa powder or you can make fake-chocolate by using carob powder -- that's what I do and I add about 1 tbsp. carob powder.
So, take 1/2 cup of the soft ice cream, put it into a cup, and then add 1/2 cup of cold DariFree liquid, then stir to gently combine. It won't be too thick, but it won't be runny. Serve with a straw.
Of course, you could stick to vanilla flavor simply by using the DariFree flavor. Or, try others, like banana or berry by adding mashed fruit to the ice cream recipe.