Colorful, refreshing and versatile, Boiron's blackberry puree is made from meticulously selected blackberries made with a pasteurizing process of rapid heating and cooling that preserves the fresh taste and color. Defrost the puree in the refrigerator for 24 to 48 hours before using, or in the microwave at moderate temperature. Use them to create delicious cocktails, smoothies, and pie fillings.