Some brands add artificial color to their butter to make them appear more yellow than they really are, but the color of unmodified butter is determined by a cows diet. Pasture-raised cows that eat most grass, hay, and silage will produce butter that is more yellow because of the carotene in their diet. Cows that eat grains, cereals, and corn tend to produce butter that is more white in appearance. It reminds us that butter has agricultural origins. Happy baking! Kye@KAF

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