Watermelon Jell-O Shots Recipe by Christine Byrne Makes about 30 wedge shots Ingredients 1 12-16 pound watermelon 4 cups vodka 4 3-ounce boxes red Jell-O mix 2 1-ounce boxes unflavored gelatin Preparation 1. Using a large chef's knife, cut the watermelon into two equal halves, lengthwise. 2.