I decided to try to make my own shake since they sold out a few days ago. It wasn't bad, just needs a little tweaking. I used light ice cream & 1% milk. It just needs a bit more mint & maybe some ice mixed in with it in the blender.
Fake Shamrock Shake
2 cups vanilla ice cream or soy ice cream
1 1/4 cups 2% low-fat milk or soymilk
1/4 teaspoon mint extract
8 drops green food coloring
1 Combine all ingredients in a blender and blend on high speed until smooth.
2 Stop blender to stir with a spoon if necessary to help blend ice cream.
3 Pour into 12-ounce cups and serve each with a straw.
4 Happy St Patrick's Day!