Pour juice, sugar, and agar agar into a medium-sized saucepan and stir.
Turn on the heat to medium and stir frequently with a whisk.
When the mixture begins to boil, reduce the heat and let it simmer slowly for 5 minutes, stirring occasionally. (This is necessary to activate the agar agar and get it to set properly.)
After it boils, turn off the heat and slowly stir in 1 cup of vodka, mixing with a whisk until well combined.
Pour the jello mixture into shot glasses and allow them to cool in the fridge for about 45 minutes.
To make them look more festive, top with vegan whipped cream and/ or sprinkles.
Notes
Be sure to add the vodka at the end after boiling the juice and agar agar, or the alcohol will cook off. Adding at the end ensures a powerful punch to your shots.
I purposely make the Jell-O in these shots slightly looser than my traditional Jell-O so that the shot will be loose enough to release from the bottom of the shot glass, allowing party guests to consume it without a spoon. If you want firmer jello, simply increase the agar agar by about 1/4 teaspoon.
Replace the vodka with additional juice to make virgin Jell-O shots. If kids will be at your party, they will surely want one of these yummy-looking treats, and the designated drivers deserve a little treat too!
If you want different-colored Jell-O, use white grape juice and add a few drops of vegan food coloring to achieve the desired colors.