Peanut butter prices are up — and likely to increase again. Edward Todd/iStockphoto.com hide caption

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The miracle fruit from West Africa has a chemical that binds to and boosts sweet taste receptors in the presence of acidic foods. Courtesy of Keiko Abe hide caption

itoggle caption Courtesy of Keiko Abe

Lemongrass stalks, when finely chopped, add a unique citrusy note to Thai cuisine. iStockphoto.com hide caption

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