Lemon Cheesecake Squares by Fine Cooking. These sweet-and-tangy squares are what you get when you cross lemon bars with cheesecake. The bars need to set up in the refrigerator, so allow at least 5 hours of chilling time before you serve (or pack) them. You can substitute lower-fat cream cheese for regular, if you like. The cheesecake itself will be slightly less creamy but still fabulous.