Tart cranberries and sour cream make pound cake sparkle

This undated photo provided by America's Test Kitchen in August 2018 shows a cranberry-sour cream pound cake in Brookline, Mass. This recipe appears in the cookbook “Perfect Cake.” (Joe Keller/America's Test Kitchen via AP)

Pound cake is simple but elegant; it’s also incredibly rich. We thought tart cranberries and tangy sour cream would provide a welcome contrast to the buttery cake, and the bright cranberries would also contribute a burst of color for an extra-special dessert.