Prepare agar according to package.Usually, you can just combine agar powder with the liquid (and optional sugar) and simmer for around 5 minutes, while stirring.
Once the agar is melt and hydrated (hence activated), pour your mixture in a mold or container.Let cool down at room temperature.It will set as soon as the agar reaches 104–113 °F (40–45 °C).
Once it’s firm, cut into small pieces.
Notes
Feel free to swap the sugar for your preferred sweetener (I usually use erythritol for this recipe).
For more detail on how to make agar jelly correctly, please check above in the post under “Tricks and tips”.