Begin by washing your grapes thoroughly and removing them from their stems. Place them in a freezer-safe container and freeze for at least 4 hours or overnight until completely frozen at 0°F (-18°C).

When you're ready to make your shake, take out your blender and add 2 cups of the frozen grapes. Pour in 1¼ cups of ice-cold water and drizzle 2 tablespoons of honey over the grapes. Blend everything on high speed for 1-2 minutes until the grapes are completely broken down and the mixture is smooth.

The consistency should be like a slushy – easily drinkable but still thick. If it's too thick to drink easily, add a little more cold water, one tablespoon at a time, blending between additions until you reach your desired consistency.

Pour your grape shake immediately into two chilled glasses. If you'd like, garnish with a few fresh grapes and mint leaves. Serve right away with a wide straw while the drink is at its perfect slushy consistency.