Prepare the Gelatin Mixture: Measure 2 cups of fruit juice into a mixing bowl. Sprinkle 2 tablespoons of gelatin powder over the juice and let it sit for 5 minutes.

Heat the Remaining Juice: Pour 2 cups of fruit juice into a pot and heat over medium-high heat until boiling.

Combine the Mixtures: Pour the boiling juice into the bowl with bloomed gelatin and whisk until dissolved.

Transfer to a Baking Pan: Pour the jello mixture into a 9x12 baking pan, spreading evenly and shaking lightly to remove air bubbles.

Chill Until Set: Refrigerate the pan for at least 2 hours until the jello is firm to the touch.

Cut and Serve: Cut the jello into cubes or fun shapes using cookie cutters and serve.

Store Leftovers: Store in an airtight container in the refrigerator for up to a week.