Weight-Loss Jello
Recipe Tested & Approved by Mia Hartwell
Every recipe is developed, cooked, and tested by Mia in a real home kitchen using everyday ingredients to ensure reliable, repeatable results.
A light, sugar-free gelatin dessert with only about 10 calories per serving. It is an easy, guilt-free way to satisfy a sweet craving, and you can stir in protein powder for a more filling snack.
By Mia HartwellUpdated August 30, 2025
Developed using tested cooking methods — cook to the temperatures given and adjust times to your equipment.
Why you'll love this recipe
- Only about 10 calories per serving
- Sugar-free and virtually fat-free
- Easy to make filling with a scoop of protein
- A guilt-free way to curb a sweet craving
Weight-Loss Jello
3 hr 10 min totalServes 4
Nutrition (per serving)
Values are estimates. See our disclaimer for details.
- Calories
- 10kcal
- Protein
- 0g
- Carbs
- 2g
- Fat
- 0g
- Fiber
- 0g
- Sugar
- 0g
Step-by-Step Instructions
- 1
Pour the sugar-free gelatin mix into a heatproof bowl. Add the boiling water and stir for about 2 minutes until the gelatin is fully dissolved.
- 2
Stir in the cold water (or cold juice) and any sweetener until combined.
- 3
If using protein powder, first shake it with a few tablespoons of cold water in a separate cup until smooth, then stir it into the gelatin mixture so it does not clump.
- 4
Fold in any diced fruit if using.
- 5
Pour into a mold or shallow dish and refrigerate 2 to 4 hours, or until firm.
- 6
Cut into cubes or spoon out, and serve plain or with a dollop of low-fat Greek yogurt.
Pro Tips for the Best Results
- Make sure the gelatin fully dissolves in the boiling water, or it will not set properly.
- Do not add too much extra liquid. Too much juice or water can keep it from firming up.
- Mix protein powder with cold water first so it does not clump when added to the warm gelatin.
- Sugar-free gelatin keeps it near zero calories. Regular Jell-O would add about 70 to 80 calories per cup.
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How to Cook Weight-Loss Jello
New to this dish? Follow along with the detailed guide below — we break down each stage so you get perfect results the very first time.
Dissolve the gelatin fully
Stir the gelatin into boiling water until it is completely dissolved, which usually takes about two minutes. Undissolved gelatin is the most common reason jello fails to set, so be patient here.
Add the cold liquid and any extras
Stir in cold water or unsweetened juice to bring down the temperature and set the flavor. If you want extra protein, blend the powder with a little cold water first so it stays smooth instead of clumping in the warm mix.
Chill until firm
Pour into a mold or dish and refrigerate two to four hours until set. Keep the proportions as written, since too much extra liquid will stop it from firming up.
Storage & Make-Ahead
Refrigerate covered for up to 3 to 4 days. Do not freeze, as gelatin breaks down and weeps when thawed.
Serving Suggestions
This weight-loss jello pairs beautifully with a crisp green salad, crusty bread, or your favorite grain. Add a simple side of roasted vegetables for a complete, satisfying dinner the whole family will enjoy.
Frequently Asked Questions
Can I make it vegan?+
Yes. Use agar-agar instead of gelatin, about 1 3/4 tablespoons. Agar needs to reach a boil to activate and sets firmer than gelatin.
How do I add protein?+
Stir in a scoop of whey or collagen protein, or fold in 1/2 cup Greek yogurt once the gelatin is slightly set, for a creamier, more filling treat.
How long does it keep?+
Store covered in the refrigerator for up to 3 to 4 days.
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