Wash grapes and de-stem them. Then pat them dry with a paper towel. Puncture the grapes with a toothpick or a fork multiple times in each grape for better liquid absorption.

Add the grapes to a large deep bowl or Tupperware container. Add the prosecco and vodka, and let sit overnight for up to 24 hours.

The next day spread sugar on a plate. Drain grapes and pat down with paper towel again, ensuring they are not completely dry this time.

Roll the grapes on the sugar plate until they are fully coated.
Add 2-3 grapes to each toothpick and add to the freezer for 2-3 hours, or until they are solid.

Enjoy your grapes straight from the freezer or as a grape garnish for a cocktail!