This Classic Key Lime Pie Recipe makes such a lovely dessert. Key lime desserts are a family favorite, so I use them often in recipes like key lime cookies and key lime bars. My most requested dessert of all time, however, is this Classic Key Lime Pie. It all started when I tried a new recipe for a family dinner over 20 years ago, and it was an instant success. Over the years I’ve made the recipe my own. This recipe is tried and true, and it’s been a staple for holidays, and events.