Rinse the grapes under cold water and pat them dry with a paper towel.

In a medium saucepan, combine the water and granulated sugar over medium heat. Stir until the sugar fully dissolves.

Once the mixture is boiling, remove it from the heat and stir in the blue raspberry-flavored Jell-O powder until fully dissolved.

Dip each grape into the blue raspberry mixture to ensure they're evenly coated; using a toothpick can make this easier.

Place the coated grapes on a parchment-lined baking sheet and chill in the refrigerator for about 15-20 minutes until the candy coating hardens.

Once set, serve and enjoy your Blue Raspberry Candied Grapes as a delightful snack or dessert.