Start by gathering all your ingredients and measuring them out. This will make the process much smoother and quicker.
In your blender, combine the 6 cups of vanilla ice cream, 1 cup of milk, and 1 cup of half and half. Blend on high speed until the mixture is smooth and creamy.
Next, add in 3/4 teaspoon of pure mint extract and 1/8 teaspoon of mint green food coloring. Blend again until well incorporated. Taste your mixture and adjust the mint flavor or color as desired.
In a separate bowl, crush the 10 Oreos into small pieces. You can do this by placing them in a zip-top bag and rolling over them with a rolling pin or using a food processor.
Add the crushed Oreos to the blender with the minty ice cream mixture. Pulse a few times to mix the Oreos in without fully blending them. You want to have delightful bits of Oreo throughout your shake.
Pour the Shamrock Shake into your prepared serving glasses. Top each shake with a generous dollop of whipped cream, a sprinkle of green sanding sugar, and a maraschino cherry on top for that perfect finishing touch.
