This easy lemon jelly is my go-to when I want a dessert that feels light and clean after a big meal — it is gently sweet, wobbly, and full of fresh citrus. I make it with agar-agar instead of gelatin, so the jelly holds its shape beautifully at the table and the whole thing comes together with just six ingredients. Served unmolded with a few orange and lemon slices, this homemade lemon jelly disappears fast every time I make it.
Ingredients for Lemon Jelly
- 0.7 oz (20 g) agar-agar powder
- 2.1 cups (500 ml) cold water, for soaking
- 10.6 oz (300 g) agave nectar, plus more to taste
- 0.8 cup (200 ml) warm water, for the agave nectar
- 2 medium oranges, juiced — about ½ cup (120 ml) juice
- 1 medium lemon, juiced — about 2½ tbsp (35 ml) juice
How to Make Lemon Jelly
- Soak the agar-agar in the cold water for at least 1 hour, until it has swollen and softened.
- Squeeze the juice from the oranges and the lemon, and strain out any seeds.
- Pour the warm water into a bowl and stir in the agave nectar until it is completely dissolved.
- While the agave nectar dissolves, pour the soaked agar-agar into a saucepan, bring it to a boil over medium heat, and boil for 1–2 minutes, stirring often.
- Mix the boiled agar-agar liquid with the agave nectar water and the fresh citrus juice, then pour the mixture into molds.
- Leave the jelly to set until firm, about 1 hour at room temperature, then unmold and serve.
Lemon Jelly Nutrition per Serving
- Calories: 165
- Carbs: 45 g
- Protein: 0.4 g
- Fat: 0 g
Pro Tips for the Best Lemon Jelly
- Taste the sweetened water before mixing. The source recipe is deliberately light on sweetness — start with the full 10.6 oz (300 g) of agave nectar, then add more to taste while the water is still warm.
- Soak the agar-agar for the full hour. Cold soaking lets it hydrate fully, so the jelly sets smooth and clear instead of grainy.
- Boil it properly — do not just warm it. Agar-agar only activates at a full boil; 1–2 minutes of steady bubbling is the step you cannot skip.
- Work while the mixture is warm. It starts setting as it cools, so pour into molds as soon as everything is combined (straining it first gives a crystal-clear jelly).
- Unmold cleanly. Dip the mold in warm water for 5–10 seconds and run a wet fingertip around the edge — the lemon jelly releases in one piece.
Lemon Jelly FAQ
How long does it take for lemon jelly to set?
Agar-agar sets faster than gelatin and works at room temperature. Let the molded jelly stand until firm, about 1 hour at room temperature, or chill it to speed things up.
Can I use a different sweetener in this lemon jelly?
Yes. Light maple syrup or rice syrup work at the same weight (10.6 oz / 300 g) instead of the agave nectar — the jelly sets exactly the same way and the citrus flavor stays bright.
Why didn’t my lemon jelly set?
Agar-agar has to reach a full boil to activate — keep it at a steady boil for the full 1–2 minutes. Too much liquid, or old weakened agar-agar, can also leave the jelly soft.
How do I store lemon jelly?
Keep it covered in the refrigerator for up to 3–4 days. Agar-agar holds its shape at room temperature (it softens only when reheated), so it also travels well.
Recipe Card
Easy Lemon Jelly with Agar-Agar
Ingredients
Method
- Soak the agar-agar in the cold water for at least 1 hour, until it has swollen and softened.
- Squeeze the juice from the oranges and the lemon, and strain out any seeds.
- Pour the warm water into a bowl and stir in the agave nectar until it is completely dissolved.
- While the agave nectar dissolves, pour the soaked agar-agar into a saucepan, bring it to a boil over medium heat, and boil for 1–2 minutes, stirring often.
- Mix the boiled agar-agar liquid with the agave nectar water and the fresh citrus juice, then pour the mixture into molds.
- Leave the jelly to set until firm, about 1 hour at room temperature, then unmold and serve.
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