Lemon Sponge Pie is a delightful vintage dessert that balances the tart brightness of lemon with a soft, airy sponge layer that rises above a creamy custard base. A favorite in many American households during the early 20th century, this recipe captures the simplicity and elegance of homemade pies before boxed mixes and shortcuts. With a signature light top and rich bottom, this pie is especially beloved for its contrast in texture and vibrant citrus flavor.