Dust the gummy bear molds with a light coat of cornstarch. Set aside.
Combine one package of Jello, 2 packets of unflavored gelatin, and 1/3 cup water in a small saucepan. Mix together and let sit for 5 minutes.
Set the pan over low to medium heat and whisk constantly until the powder fully dissolves. This should take about 5 more minutes.
Once everything is dissolved, use a dropper to carefully fill the prepared gummy bear molds with the gelatin mixture.
Let the gummies rest for 5 to 10 minutes to cool slightly. Lightly dust the backs with cornstarch, then transfer the molds to the refrigerator for about 15 minutes until they are completely set.
Place 1 tablespoon of cornstarch in a shallow bowl. Remove the fully set gummy bears from the molds and add them to the bowl. Gently toss to coat them evenly, which helps keep them from sticking together. You can also shake them with the cornstarch in a large zip-top bag instead.
Store gummies in an airtight container.
