How to Dehydrate Apples Without Turning Brown?

Preventing Oxidation

To prevent apples from turning brown when dehydrating, you can quickly cool them after slicing. This stops the enzymatic browning reaction that occurs when apples are cut and exposed to oxygen. To cool the sliced apples, spread them out in a single layer on a baking sheet and place it in the freezer for 10-15 minutes. This step will slow down the browning process and make it easier to preserve the apples.

Dehydration Process

For dehydrating apples, it’s best to use a low temperature dehydration process to prevent the formation of brown spots and to preserve the nutrients and flavor. Set your dehydrator to 135°F (57°C) and dehydrate the apples for 6-8 hours. You can also use a food dryer or a low-temperature oven at 135°F (57°C) for 6-8 hours. Make sure to check the apples after 6 hours and continue dehydrating until they reach your desired level of dryness.

Adding an Antioxidant Solution

To add an extra layer of protection against browning, you can soak the sliced apples in an ascorbic acid or lemon juice solution before dehydrating. Mix 1 tablespoon of ascorbic acid or lemon juice with 1 cup of water and soak the sliced apples for 10-15 minutes. This will help to inhibit the browning reaction and preserve the apples’ natural color and flavor.