You already know I’m not waiting in a drive-thru line for a Shamrock Shake when I can make one at home that tastes even better. This Ninja Slushi Shamrock Shake is thick, creamy, perfectly minty, and that nostalgic green we all grew up loving. I’ve been making frozen treats long before fancy machines were a thing, so trust me when I say this method gives you that real milkshake texture, not watered-down ice milk.
You will love my other Ninja Slushi Recipes like Ninja Slushi Milkshake, Ninja Slushi Wendy's Frosty, Ninja Slushi Strawberry Lemonade Slush, and Ninja Slushi Vanilla Protein Shake.
Don't have a Ninja Slushi Machine? Click here to grab one.
Key Ingredients
- Milk: Any milk works, but whole milk produces the creamiest texture.
- Green Food Coloring: This is if you want the classic color. If you don't want to use artificial dyes, use these natural food colorings.
- Mint Extract: This is different than peppermint extract. Peppermint extract is made strictly from peppermint leaves, so it has that bold, icy, candy-cane flavor you expect in holiday desserts. Mint extract is a blend of different mint varieties, usually spearmint and peppermint. It’s milder, sweeter, and more herbal tasting. The flavor leans closer to chewing gum or fresh garden mint instead of that strong cooling punch.
- Sweetener or Sugar: This machine likes standard table sugar, allulose, and monkfruit from my personal testing and experience. I use monkfruit sweetener because it's zero calorie.
How to Make Ninja Slushi Shamrock Milkshakes
Detailed measurements and full instructions can be found in the recipe card at the bottom of this post.
- In a large cups or a pitcher, whisk together milk, granulated sugar, pure mint extract, and green food coloring. Whisk until fully combined.
- Pour the mixture into your Ninja Slushi. Press milkshake for the Ninja Slushi.
- Allow the machine to process. Let the machine run for 15-45 minutes, depending on the sugar content and temperature of the liquid. Mine took 20 minutes.
- Once the cycle is complete, place a cup under the self-serve spout and pull the handle to dispense the milkshake.
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Troubleshooting Tips if You Have Problems with the Machine
- Check the Liquid Ratio – If the mixture is too thick, the machine may struggle to process it. Try adding 1-2 tablespoons of additional liquid (water or milk) and restart the cycle.
- Make Sure the Mixture is Cold Enough – The machine works best when the liquid is super cold. If your base wasn’t chilled before adding it to the machine, try refrigerating or briefly freezing it before processing.
- Let It Process Fully – The Ninja Slushi Machine may take a few minutes to reach the right consistency. Be patient and let it complete the cycle. If needed, restart the process.
- Check for Ice Blockage – If the mixture is freezing unevenly, it may be too cold or concentrated in one area. Let it sit for a minute, give it a gentle stir, and try again.
- Ensure the Machine is Properly Assembled – Double-check that all parts (including the lid and paddle) are locked into place. If something is misaligned, the machine may not operate correctly.
Substitutions and Add-ins Ideas
- Chocolate chips
- Mini chocolate chips
- Crushed Oreos
- Chocolate syrup
- Hot fudge
- Andes mints
- Crushed peppermint candies
- Mint chocolate candy pieces
- Spinach (for natural color)
- Vanilla protein powder
- Collagen peptides
- Matcha powder
- Espresso shot
- Irish cream syrup
- Caramel drizzle
- Green sprinkles
Frequently Asked Questions (FAQs)
Use the milkshake setting.
Any milk or non-dairy milks will work in the recipe. Whole milk is the best to get it rich and creamy, ideal for a classic diner-style shake.
Yes! A high-powered blender or an ice cream maker works too, just blend until thick and creamy. You will need to use a lot of ice and taste the drink to decide if you need to add more of the ingredients for flavor.
Yes! Use almond, oat, coconut, or cashew milk.
Adjust the dial on the right side of the machine. The higher up you select, the thicker the milkshake is.
Yes! Store it in the freezer and let it sit for a few minutes before stirring or blending to get the right consistency.
More Drink Recipes
Ninja Slushi Chick-fil-A Frosted Lemonade
Ninja Slushi Lemonade
Ninja Slushi Daiquiri
Ninja Slushi Margarita
Ninja Slushi Cherry Slush
Ninja Slushi Coffee Frappé (Vanilla Caramel)
Ninja Slushi Shamrock Shake
Want to save this recipe for later?
I'll email it to you, so you can come back to it later! You will also grab your FREE ebook with my best 30-minute one-pot meals! Dinner stress stops here.
Equipment
Ingredients
- 4 cups milk
- 1 cup sweetener or sugar
- 7-8 drops green food coloring
- ½ teaspoon pure mint extract Not peppermint extract. If you like it really minty, use ¾-1 teaspoon.
Instructions
- In a large cups or a pitcher, whisk together milk, granulated sugar, pure mint extract, and green food coloring. Whisk until fully combined. Taste the mixture. Add more mint if it needs it. If it has too much mint, add more milk.
- Pour the mixture into your Ninja Slushi. Press milkshake for the Ninja Slushi.
- Allow the machine to process. Let the machine run for 15-45 minutes, depending on the sugar content and temperature of the liquid. Mine took 20 minutes.
- Once the cycle is complete, place a cup under the self-serve spout and pull the handle to dispense the milkshake.
Notes
Nutrition
Nutrition Data
Macros are provided as a courtesy and should not be construed as a guarantee. This information is calculated using MyFitnessPal.com. To obtain the most accurate nutritional information in a given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe, using your preferred nutrition calculator. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.
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