Keto Jello Salad
Published December 16, 2022 • Updated February 25, 2026
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My sugar-free jello salad has three bright layers of red, white, and green that look stunning on a holiday table. I make this ahead every time because it needs fridge time between layers, and it stays perfect for days.
I started making layered jello for Christmas years ago, and it became the dish everyone expected me to bring. The three layers (strawberry, marshmallow cream, lime) look impressive, but the process is actually straightforward. You just need patience between layers.
The white middle layer is what makes this keto jello salad special. I use sugar-free marshmallows (either ChocZero or Max Mallow) melted with unflavored gelatin and heavy cream. That layer sets up creamy and opaque, not rubbery, which is the whole point. Most sugar-free gelatin desserts skip this step entirely and just stack two flavors. The cream layer in between is what gives you that visual pop when you slice it.
One thing I learned early on: not all “sugar-free” jello is actually keto-friendly. The Jello brand sugar-free boxes contain maltodextrin, which spikes blood sugar the same way regular sugar does. I switched to Simply Delish (sweetened with stevia and erythritol) and the difference in how I feel after eating it is real.
I also made the mistake once of tossing fresh pineapple chunks into a batch. The whole thing stayed liquid. Fresh pineapple, kiwi, and papaya all contain enzymes that break down gelatin. If you want fruit in your layers, stick with berries or use canned pineapple (the canning process deactivates the enzymes).
If you want more gelatin desserts, try my jello whip for something simpler, or my keto chocolate mousse when you want something richer. And if your holiday table needs a lighter side, my keto fruit salad pairs well with this.
How to make keto jello salad
The layering is easy but you cannot rush it. Each layer needs about an hour in the fridge before you pour the next one on top. The single biggest mistake is pouring a warm layer over a set one. I did this once and the heat melted the red layer right through. Now I let every layer cool to room temperature on the counter before it goes anywhere near the dish.
The good news is you don’t have to do all three layers in one session. I usually make the red layer the night before, then finish the white and green layers the next morning. The whole process is flexible as long as each layer is fully set before the next one goes on. If you’re bringing this to a low carb holiday potluck alongside something like broccoli cauliflower salad, make both the day before and you’re set.
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Ingredients
1 (0.7 oz) package sugar-free strawberry jello -
1 tablespoon unflavored gelatin
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2 cups sugar-free marshmallows
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1/4 cup heavy cream
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1 (0.7 oz) package sugar-free lime jello
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jello mold
Step by Step Instructions
Step by Step Instructions
Prepare the red layer
Mix sugar free strawberry jello according to package directions and pour into a jello mold or square baking dish. Refrigerate for 1 hour or until set.
- 1 package strawberry gelatin mix
Bloom gelatin
Mix unflavored gelatin with ¼ cup water in a small bowl. Let bloom for 3-5 minutes.
- 1 tablespoon unflavored gelatin
- 1/4 cup water
Prepare the white layer
Transfer the bloomed gelatin to a larger bowl and pour in 1 cup boiling water. Stir to dissolve gelatin. Add marshmallows. Heat in the microwave at 30 second intervals, stirring in between, until marshmallows have dissolved. Can use a stovetop as well. Stir in heavy cream. Let cool to room temperature before pouring on the red layer to avoid melting the red layer. Refrigerate for 1 hour or until set.
- 1 cup boiling water
- 2 cups sugar-free marshmallows
- 1/4 cup heavy cream
Prepare the green layer
Mix sugar-free lime gelatin according to package directions. Let cool to room temperature and pour over white layer. Refrigerate for 1 hour or until set.
- 1 package lime gelatin mix
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
Can I make this for other holidays besides Christmas?
I make this year-round now. The technique is the same for every holiday. I swap strawberry and lime for red/white/blue on the 4th of July, orange and grape for Halloween, and purple and lemon for Easter. The white marshmallow cream layer stays the same every time. Once I realized the color swap trick, this became my go-to keto dessert for basically every family gathering.
Why won't my jello set?
The most common reason is fresh fruit with enzymes that break down gelatin. I learned this the hard way when I added fresh pineapple chunks to a batch and the whole thing stayed liquid overnight. Fresh pineapple, kiwi, mango, and papaya all contain bromelain or similar enzymes that prevent setting. If you want pineapple, use canned (the canning process kills the enzymes). Other reasons: not enough gelatin powder, or not letting the gelatin bloom properly before adding hot water.
Can I use Cool Whip instead of heavy cream in the white layer?
I've tested both. Cool Whip works in a pinch, but the white layer comes out less firm because Cool Whip is mostly air and water. If you go that route, add it after the marshmallow-gelatin mixture has cooled (not while it's hot, or the Cool Whip deflates). I prefer heavy cream because it gives the layer more body and a cleaner white color.
What sugar-free marshmallows work best and where do I find them?
I've used both ChocZero and Max Mallow. ChocZero melts more smoothly, which makes the white layer easier to work with. Max Mallow works fine but takes a bit longer to fully dissolve. I haven't found either brand consistently in stores, so I order them online. If you can't find sugar-free marshmallows at all, you can skip them and make the white layer with just unflavored gelatin, heavy cream, and a tablespoon of powdered sweetener. It won't have that marshmallow flavor but it still sets up white and creamy.
Can I use coconut cream instead of heavy cream to make it dairy-free?
Yes. I've made the white layer with full-fat coconut cream and it sets just as firm. Use the solid part from a chilled can of coconut cream (not coconut milk, which is too thin). The layer picks up a subtle coconut flavor that I actually like with the fruit jello layers. Everything else stays the same.
How many net carbs are in a serving?
My version comes out to about 1-2g net carbs per slice, depending on which sugar-free jello brand and marshmallows you use. The Simply Delish jello I use has 0g net carbs per serving. The marshmallows are the biggest variable. I always check the label on whatever brand I'm using that batch.
Can I make this without a jello mold?
I use a 9x9 square baking dish just as often as I use the mold. The layers look just as dramatic when you cut clean squares. I've also poured the layers into individual clear cups for parties where I didn't want to deal with slicing. The cups are actually easier because each person just grabs one.
Made this over the holidays and my white layer sank right into the red instead of sitting on top. How do I know when each layer is set enough to pour the next one?