How to cook a moist beef burger stuffed with American cheese

This undated photo provided by America's Test Kitchen in May 2018 shows Jucy Lucy burgers in Brookline, Mass. This recipe appears in “The Complete Cook's Country TV Cookbook, 2017.” (Daniel J. van Ackere/America's Test Kitchen via AP)

Minneapolis taverns are famous for the Juicy Lucy, a moist beef burger stuffed with American cheese. Replicating the Juicy Lucy seemed easy enough — but our burgers, cooked to well-done to melt the cheese inside, were dry and tough or the cheese melted through the meat, leaving an empty cavern where the cheese had been.