Used to prevent browning and color loss in fresh-cut or peeled fruits and vegetables before drying, freezing, or canning. Ascorbic acid protects natural pigments by neutralizing oxygen that causes oxidation, keeping produce bright, flavorful, and nutrient-rich.
Unlike citric acid, which simply lowers pH, ascorbic acid acts as a direct antioxidant, consuming oxygen and halting the enzymatic reactions that cause discoloration. It is particularly useful for apples, peaches, pears, and potatoes but can also be used with green herbs like parsley or basil to retain color during drying.
Ingredients
- 1 teaspoon food-grade L-ascorbic acid powder
- 1 quart (4 cups) cold water
- Bowl or container large enough to submerge produce
- Clean towel or paper towels for drying
How to Make It
- Dissolve 1 teaspoon of ascorbic acid powder in 1 quart (4 cups) of cold water.
- Dip peeled or sliced fruits and vegetables in the solution for 3 to 5 minutes.
- Remove and drain thoroughly, then pat dry.
- Proceed with dehydrating, freezing, or canning as usual.
How to Use It
- Ideal for apples, peaches, pears, and potatoes to prevent darkening after cutting.
- Use before dehydration, freezing, or canning to maintain color and texture.
- For herbs such as parsley and basil, dip briefly and dry immediately for bright green results.
- Works well as a pre-treatment for shredded or sliced produce used in mixed vegetable storage or ready-to-cook blends.
Warnings
- Do not reuse dipping solution; discard after one session as it loses effectiveness.
- Avoid contact with eyes or open cuts; the solution is mildly acidic.
- Use food-grade powder only, not crushed vitamin tablets.
Storage & Shelf Life
- Store dry ascorbic acid powder in a sealed glass or HDPE container in a cool, dry, dark location.
- Remains stable for several years if kept uncontaminated.
- Once mixed with water, the solution should be used within a few hours for best effectiveness.
When to Use It
- Before dehydrating or freezing fruits and vegetables to preserve natural color.
- During home canning or food preparation for long-term storage.
- For maintaining visual quality and nutrient value of produce in off-grid or extended food storage conditions.