This apple crisp gets an unlikely boost from cranberries

This undated photo provided by America's Test Kitchen in November 2018 shows a cranberry-apple crisp in Brookline, Mass. This recipe appears in the cookbook "Complete Make-Ahead." (Daniel J. van Ackere/America's Test Kitchen via AP)

Although it’s hard to imagine that apple crisp needs much improvement, we liked the tartness and texture that cranberries added to one of our favorite standard dessert recipes. The challenges were balancing the fruit flavors and making sure that the filling baked evenly while the topping stayed crisp.