To prevent browning of shredded cabbage, toss it with an acidic ingredient like lemon juice or vinegar immediately after shredding. This inhibits the enzymes responsible for oxidation.
Shredded cabbage, like many cut fruits and vegetables, browns due to enzymatic browning. This occurs when enzymes called polyphenol oxidases (PPOs) react with oxygen in the air, causing the cabbage to discolor. Here's a step-by-step guide to prevent this:
Prepare Your Acidic Solution: Before you even start shredding, have a bowl ready with a solution of either lemon juice, lime juice, or vinegar (white vinegar or apple cider vinegar work well) and water. A ratio of 1 tablespoon of acid to 1 cup of water is usually sufficient.
Shred the Cabbage: Shred the cabbage using a knife, mandoline, or food processor. The finer the shred, the more surface area is exposed, and the faster it will brown if unprotected.
Toss Immediately: As soon as the cabbage is shredded, immediately toss it with the acidic solution. Make sure all the shredded cabbage is coated evenly. The acid inhibits the PPO enzymes, preventing them from reacting with oxygen.
Store Properly: If you're not using the cabbage right away, store it in an airtight container in the refrigerator. The airtight container minimizes exposure to oxygen, further slowing down the browning process.
Don't overdo the acidic solution! Too much lemon juice or vinegar can alter the taste of the cabbage. Start with a small amount and add more as needed, tasting as you go. You can also use other acidic ingredients like buttermilk or yogurt in dressings to help prevent browning.