- Bumpy Grapefruit Rate this Recipe Prep Time 3 minutesTotal Time 3 minutes Ingredients - What's in it?▢ 1 oz Gin▢ 5 oz Grapefruit Juice Adjust Servings 1 serving Instructions - How to make it:Stir both ingredients together in a highball glass filled with ice cubes. Garnish with a slice of lemon. and serve. Zombie Cocktail Vegas Bomb Shot Course Cocktail Burfentailor BullVodka