Blend till smooth. Ninjas only come with 1 setting.
You may add more milk if you like it thinner. More sugar or different sweetener according to diet or taste preferences.
To make other flavors you can throw in a cup of fresh or frozen fruit to make fruity shakes or 1/2 cup cocoa powder to make chocolate shakes.
I found this recipe when I was pregnant with Lil man and had gestational diabetes. Originally calls for coconut milk frozen into cubes and almond milk sweetened with sugar substitute.