Start by selecting your favorite fruit juice, ensuring it’s 100% juice for the best flavor. In a medium saucepan, pour in the fruit juice and add sugar if you prefer a sweeter jello. Stir the mixture well using a whisk until the sugar is completely dissolved.

Sprinkle agar agar powder evenly into the juice mixture while continuing to stir. Place the saucepan on medium heat and bring the mixture to a gentle boil, activating the agar agar.

Once your mixture reaches a rolling boil, reduce the heat to low and whisk constantly for about 4 minutes to ensure the agar agar dissolves completely.

Carefully pour the hot liquid into your chosen molds or clear glasses, leaving some space at the top for expansion.

Transfer the filled molds to the refrigerator and let them chill for at least 2 hours, or until they feel firmly set.

Once fully set, gently remove the jello from the molds by running a knife around the edges if necessary and serve with fresh fruit chunks or a sprig of mint.