Keto Vanilla Milkshake
Published June 20, 2020 • Updated March 1, 2026
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I make this keto vanilla milkshake thick enough to hold a spoon, with a cream-forward vanilla flavor that actually tastes like the real thing.
I started making this vanilla milkshake the week I went keto, and the first few attempts were terrible. Watery, bland, that weird sweetener aftertaste. But I kept at it because I missed real milkshakes more than almost anything else, and the version I make now is the one my family actually requests.
The biggest upgrade came from a reader tip I wish I had figured out myself: freeze heavy cream in an ice cube tray and use those in place of half the regular ice. The texture goes from thin shake to thick soft-serve territory. The cream flavor stays the whole way through instead of getting diluted by all that plain ice. My Vitamix needs about 30 extra seconds with the cream cubes, but the difference is massive.
The other thing I changed early on was switching from vanilla extract to vanilla paste. In cold drinks, extract just fades out, especially with all the ice. Paste holds its flavor and you get those little vanilla bean flecks throughout. If you can find it, use it. I won’t go back.
For the sweetener, I use powdered monkfruit because it dissolves cleanly in cold liquid. Granular erythritol goes gritty in cold drinks (more on that below). If you have allulose, that works too. I start with 2 tablespoons and taste before adding the third because the cream cubes change the sweetness balance.
The protein powder is optional, but I add a scoop of Isopure vanilla when I want this to be more of a meal. It blends smooth and the flavor actually comes through instead of getting lost. Riley’s husband thought he was getting ice cream when she made it with the protein powder, which is about the best review you can get.
This is a low carb treat that works year-round. I’ve made it in February with zero regrets. If you want more frozen drink ideas, try my keto frappuccino for a coffee version, my creamy keto smoothie for something fruit-forward, or my frozen hot chocolate when you want chocolate instead of vanilla.
How to make the best keto milkshake
I have made dozens of keto milkshakes and the technique matters more than the ingredients. Here is what I have learned.
Use frozen cream cubes for thickness. Pour heavy cream into an ice cube tray the night before. Swap those for half the regular ice. The shake comes out thick and creamy instead of thin and watery. Your blender needs a little more time with them, but it is worth every second.
Sweetener choice matters in cold drinks. Granular erythritol does not fully dissolve at cold temperatures, so you end up with a gritty texture. I use powdered monkfruit because it dissolves cleanly. Allulose and liquid stevia also work. Start with less and taste as you blend.
Blend in stages. I add the ice first and pulse to crush, then add the liquid ingredients and blend on high until smooth. If it looks too thick, add a splash more milk. Too thin, add a few more ice cubes or cream cubes.
If you like blended drinks, my chocolate peanut butter smoothie uses a similar technique, and my pina colada smoothie is another favorite.
Ingredients
3 cups ice -
1 cup unsweetened macadamia nut milk or other nut milk
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1/2 cup heavy whipping cream
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2-3 tablespoons powdered monkfruit or erythritol
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1 scoop unflavored or vanilla protein powder, optional
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1 teaspoon vanilla extract or paste
Nutrition disclaimer
The nutrition information provided is an estimate and is for informational purposes only. I am a Doctor of Pharmacy (Pharm.D.); however, this content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified health provider before making any lifestyle changes or beginning a new nutrition program.
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Get My Macros + Recipes →Frequently Asked Questions
Why does my milkshake taste watery?
I had the same problem with my first batch. The fix that changed everything for me was freezing heavy cream in an ice cube tray and using those in place of half the regular ice. Plain ice dilutes the flavor as it melts. Cream cubes keep it thick and creamy the whole way through. I also make sure to use full-fat macadamia or coconut milk, not the light versions.
Can I use erythritol instead of monkfruit?
I have tested both, and erythritol goes gritty in cold drinks because it does not fully dissolve at low temperatures. If erythritol is all you have, use the powdered version and blend longer. My preference is powdered monkfruit or allulose because they stay smooth. Liquid stevia works too, but I find it harder to dial in the right amount.
What is the best protein powder to use in this?
I have tried a few and Isopure vanilla is my go-to. It blends smooth and the vanilla flavor actually comes through instead of getting buried by the ice. Unflavored collagen peptides work if you want the protein without extra flavor. Stay away from anything with a thick, chalky texture because it will wreck the consistency.
Can I make this without a blender?
I would not recommend it. You need the blending power to crush the ice and get that smooth, thick texture. A food processor can work in a pinch, but I have tried it and it takes longer and does not get as creamy. Even a basic countertop blender works fine for this. My keto hot chocolate is a better option if you do not have a blender.
How do I make it thicker without adding more ice?
My two favorite tricks: frozen cream cubes (freeze heavy cream in an ice cube tray overnight) and a tiny pinch of xanthan gum, maybe 1/8 teaspoon. The cream cubes are the bigger difference. I also blend and then freeze the finished shake for 15-20 minutes, then stir. It firms up to soft-serve thickness without getting icy.
Can I use a different type of milk?
I use unsweetened macadamia nut milk because it is the creamiest with the lowest carbs. Almond milk works but the shake will be a little thinner. Coconut milk (the carton kind, not canned) is another good option. I have tried all three and macadamia wins on texture every time. For an even richer version, try my frozen keto lemonade technique with coconut cream.
How do I make chocolate or strawberry versions?
I make these all the time. For chocolate, I add 2 tablespoons of unsweetened cocoa powder and an extra tablespoon of sweetener. For strawberry, I swap in 1/2 cup of frozen strawberries for some of the ice and skip the sweetener entirely because the berries are enough. Peanut butter is another good one: 2 tablespoons of natural peanut butter blended in. My cucumber smoothie is a refreshing alternative if you want something lighter.
How long can I store leftover milkshake?
I drink mine right away because the texture is best fresh. If I have leftovers, I pour them into a jar and refrigerate for up to 24 hours, then re-blend before drinking. It separates and gets thin if you just stir it. The frozen cream cube version holds up better as leftovers than the regular ice version, which is another reason I always make it that way now.
You’ll feel like you’re at an old fashioned soda shop when you take a sip of this vanilla milkshake. It’s the perfect summertime treat: creamy, smooth, and sugar-free. Adding a scoop of protein powder gives extra protein to help keep you full for hours.
Once you learn how to make this shake, you can whip it up for your kids as an afternoon dessert or enjoy a glass yourself with a little whipped cream and sprinkles on top. Top it with a cherry for a nostalgic feel.
Although this sugar-free milkshake can be made entirely from heavy whipping cream, I like to thin it out with nut milk. This decreases the calories.
My favorite nut milk is 
Adding protein powder to a milkshake is a great way to get extra protein to help keep you full. It’s also a good way to get protein in my kids’ diet without them knowing. My kids love vanilla shakes in the summertime, and this is one tasty treat I don’t mind making for them, especially with a little extra protein. They also love it with a straw and cherry on top!
I kept seeing keto milkshakes that came out watery no matter what I tried, so I almost passed on this one. But the heavy cream plus three cups of ice actually gets it thick enough that my blender was working for it (that felt like a good sign). I've made probably four other keto shake recipes since January and this is the first one that doesn't taste like I'm just being optimistic about ice cold nut milk.
I was pretty convinced keto milkshakes were just a sad joke. Every recipe I tried was basically sweetened nut milk with ice chips floating in it. Made this one last week and the heavy whipping cream actually makes it thick. Like, hold-a-spoon-upright thick. Blended it with macadamia nut milk and it tastes way closer to the real thing than I expected from 3 ingredients. Vanilla comes through clean, not artificial. First keto dessert drink I've had that didn't feel like settling. Already planning to try it with almond butter next time.
I gave up milkshakes the day I started keto and genuinely told myself that was just a thing I didn't get to have anymore. Made this on a whim last week and sat at my kitchen counter in kind of a stunned silence. The heavy cream is what makes it (the macadamia nut milk alone wouldn't do this), it comes out thick and rich in a way I forgot was possible. I used vanilla paste instead of extract and it gave it this almost floral note I wasn't expecting. Only thing I'd tweak is the sweetener level, I needed closer to 3 tablespoons to hit my sweet spot, but that's an easy dial to turn. Grateful this recipe exists.
The stunned silence got me. 3 tablespoons is where mine lands too, the 2 is really just the starting point.
Good to know 2 is more of a floor. Starting at 3 next time.
Tried probably six keto milkshake recipes and every single one tastes like watered-down diet food. The heavy cream is what finally makes this one taste like an actual milkshake. Still dialing in my sweetener but it's the only version I've kept.
Yeah, the cream is the whole thing. For sweetener, powdered monkfruit is where I landed, erythritol goes gritty in cold drinks no matter how long you blend.
I swapped the vanilla extract for vanilla bean paste and it brought a custard depth I wasn't expecting, closer to soft serve base than a typical milkshake. The bigger discovery came from freezing heavy cream in an ice cube tray overnight and using those in place of half the regular ice. It comes out so much thicker and richer, holds its shape without getting watery, and the cream flavor stays the whole way through. Yes, making milkshakes in February, no regrets. Blend time is a little longer with the cream cubes (my Vitamix needed about 30 extra seconds) but totally worth it. Won't make it any other way.
Cream cubes are permanent in my freezer now, specifically for this. Mine runs 40-45 extra seconds on the Vitamix depending on how frozen the cubes got. Worth it.
Swapped the vanilla extract for vanilla paste and the flavor went from light to actually rich, worth the upgrade if you have it.
The paste holds better in cold drinks. Extract just fades out, especially with all the ice.
This brought me right back to the ice cream shop on the boardwalk where I spent every summer as a kid. That same thick vanilla flavor, just without the sugar crash after. I used vanilla paste instead of extract and it made such a difference. Been keto for 8 months now and this is the first time something actually tasted like the real thing I've been missing.
Vanilla paste over extract every time if you can get it. The flecks, the depth, the whole thing just lands differently. 8 months in and hitting that first real 'it tastes like the actual thing' moment is pretty great.
Husband asked if we had ice cream. Made this instead w/ the protein powder and he didn't complain. 1.3 carbs is clutch
Love that he didn't complain. That's the real test. The protein powder version is my go-to too when I want it to feel more filling.
Tastes great! I use isopure vanilla protein powder with this.
Isopure vanilla is a good one for this. Blends smooth and the flavor actually comes through instead of getting lost in all the ice.
I left out the sweetener and added a strawberry. So yummy. This may well be my summer time lunch.
Strawberry covers the sweetening so you don't even need the monkfruit. Good summer lunch.