To retain the bright green color in chutneys, blanch the greens briefly before grinding and add an acidic ingredient like lemon juice or amchur powder.
The vibrant green color of chutneys can fade due to oxidation and heat generated during grinding. Here's a step-by-step guide to prevent this:
Blanch the Greens: Briefly blanch the greens (coriander, mint, etc.) in boiling water for about 30-60 seconds. This deactivates enzymes that cause discoloration.
Shock in Ice Water: Immediately transfer the blanched greens to ice water to stop the cooking process and preserve the color.
Drain Thoroughly: Ensure the greens are well-drained before grinding to avoid a watery chutney.
Add Acid: Incorporate an acidic ingredient like lemon juice, lime juice, amchur (dry mango) powder, or even a small piece of tamarind. The acid helps to stabilize the chlorophyll and maintain the green color.
Grind Quickly: Grind the chutney in short bursts, avoiding prolonged grinding which can generate heat and dull the color. Add ice cubes while grinding to keep the mixture cool.
Store Properly: Store the chutney in an airtight container in the refrigerator. A layer of oil on top can further prevent oxidation.
Avoid using metal spoons when serving or storing green chutney, as metal can react with the ingredients and cause discoloration. Use a clean, dry glass or plastic spoon instead.