Food EditionCookAmericanSnackStovetop Fruit Jellies
1 hr 30 minIntermediateServes 12 squares
American · Snack

Stovetop Fruit Jellies

Stovetop fruit jellies are made by reducing pureed fruit with a thickening agent like agar-agar or gelatin until the mixture sets firmly at room temperature or in the fridge. The process relies on bringing your liquid base to a simmer and ensuring your setting agent is fully hydrated before pouring it into a shallow mold to cool.

Total time
1 hr 30 min
Hands-on
20 min
Serves
12 squares
Difficulty
Intermediate
Before you start

Consistency is your main hurdle.

Work quickly once your thickening agent hits the boiling fruit mixture, as it will start to set the moment the temperature drops. Have your mold ready and level before you even turn on the stove.

  • small saucepan
  • whisk
  • silicone spatula
  • 8x8 inch square glass dish
  • fine mesh sieve
Ingredients

What goes in.

  • 2 cupsfresh fruit puree (strawberries, raspberries, or mango)
  • 2 tbspagar-agar powder
  • 1/2 cupgranulated sugar
  • 1 tsplemon juice
The key technique

Blooming and Boiling

Agar-agar must reach a full boil to activate its setting properties. If you don't whisk it thoroughly while the liquid bubbles, you will end up with isolated clumps of powder rather than a smooth, firm jelly.

Step by step

The method.

  1. Prepare the fruit

    Pulse your fruit in a blender until smooth, then push it through a fine mesh sieve into your saucepan to remove seeds and fibers.

  2. Dissolve the solids

    Whisk the sugar and agar-agar into the cold fruit puree. Do not turn on the heat until everything is combined and no dry streaks remain.

  3. Boil the mixture

    Place the pan over medium heat. Bring the mixture to a steady, rolling boil while whisking constantly for 3 minutes to ensure the agar-agar is fully activated.

  4. Set the mold

    Remove from heat, stir in the lemon juice, and immediately pour the liquid into your glass dish. Let it sit undisturbed at room temperature for 30 minutes, then move to the fridge to firm up completely.

Variations

Other turns to take.

Herbal infusion

Steep fresh basil or mint in the fruit puree while it warms, then strain it out before adding the setting agent.

Citrus zest

Add a teaspoon of finely grated zest into the finished mixture right before pouring to provide a sharp contrast to the sweetness.

Tips & troubleshooting

When it doesn't go to plan.

Tip

Test the set by placing a small drop on a cold plate; if it solidifies within 30 seconds, your ratio is correct.

Tip

Avoid using acidic fruits like pineapple raw, as they can prevent the agar-agar from setting properly.

Tip

Cut the jellies while they are still slightly chilled for the cleanest edges on your cubes.

Questions

The ones that keep coming up.

Can I use gelatin instead of agar-agar?

Yes, but use three times the volume. Keep in mind that gelatin-based jellies will melt at room temperature, while agar-based ones will hold their shape in the heat.

Why did my jelly turn out rubbery?

You likely used too much agar-agar or boiled it for too long, causing too much water to evaporate. Start with the measured amount and whisk thoroughly.

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