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Foods -- Fruit

Why do bluberries sometimes turn green in baked goods?

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In baked products like a quick bread, the pigments (anthocyanins) in the blueberries may turn a green color as a natural reaction to the acidity or alkalinity of the product. If the outer portion of the baked product develops the color, it is probably in response to the acid from the fruit reacting with an aluminum pan. Removing the product from the baked pan as soon as it is cool enough to handle should minimize this reaction. In either case, the food is safe to eat.

PREPARED BY: Angela M. Fraser, Ph.D., Associate Professor/Food Safety Specialist, and Carolyn J. Lackey, Ph.D., R.D., L.D.N., Professor/Food and Nutrition Specialist, North Carolina State University (August 2004)

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