Frozen Sour Grapes

Tips and Tricks

• Serving young children? Cut the grapes in half lengthwise before coating. Whole grapes are a choking hazard for toddlers and young kids, and halved grapes actually pick up more coating.
• Dry grapes, dry sugar. The two most common problems are the same problem. Pat the grapes dry after rinsing, work in small batches, and start a fresh bowl of sour sugar the moment the old one turns damp.
• Do not skip the single layer. Grapes piled on top of each other freeze into one clump. Spread them out, then transfer to a container once frozen solid.
• Dial in the sour. Start at 2 teaspoons of citric acid per 1/4 cup of sugar. Go to 3 teaspoons for serious pucker, or drop to 1 teaspoon for kids.
• Double the sour. For an even sharper result, sprinkle a teaspoon of citric acid over the grapes while they sit in the lemon juice, in addition to what goes in the sugar. This builds tartness in two stages.
• Use firm, plump grapes. Softer grapes shrivel in the freezer. Green grapes give the tartest result and red grapes come out sweeter. Cotton candy grapes, when you can find them, make an incredible sweet and sour version.
• Try the refrigerator version. For a candy shell instead of an icy bite, chill the coated grapes in the fridge for about 2 hours instead of freezing. The coating sets crisp and the grape stays juicy.
• Make it a chili lime version. Add a teaspoon of Tajín or chili lime seasoning to the sour sugar, or drizzle the finished grapes with chamoy for a sweet, sour, and spicy twist.
• Make a bigger batch of coating. Mix extra sugar and citric acid and keep it in a sealed jar. It stays good for months and works on blueberries, halved strawberries, mandarin segments, pineapple chunks, and melon.
• Go sharper with malic acid. Swap in Hoosier Hill Farm Malic Acid Powder for a more intense sour, or use half citric and half malic for a sour that hits fast and lingers.