Add them to a bowl and squeeze out the lemon and lime juice on top. Use your hands to make sure every grape is covered in juice.
In a separate little bowl, add the sugar or other sweetener of choice. I used half sugar and half monkfruit.
Roll each grape in the sugar. Then put them back in the bowl and place in the freezer for 2-3 hours and then enjoy!
Notes
Choose firm grapes: Make sure your grapes are firm to the touch and not soft or they’ll get mushy.
Use fresh juice: Though bottled lemon and lime juice may be easier, I suggest you use fresh juice for the best fresh and tart flavor.
Balance the sweetness: Use as much or as little sugar as you like to balance the tartness of the citrus juice.
Make sure your grapes are dry: Wash and dry your grapes before dipping them in the citrus juice as you want as much of the juice to adhere as possible.
Coat evenly: Try your best to coat the grapes with the juice and the sugar evenly.
Make ahead and storing: These sour patch grapes are ideal to make ahead of time as they need to freeze for a few hours. You can make them a few days ahead of when you want to serve them and let them sit in the freezer until you are ready for them. Leftovers keep in an airtight container in the freezer for up to 3 months.