These 3-Ingredient Lemon Bars are a brilliant shortcut to a classic bakery treat, using a lemon cake mix to create both a buttery shortbread-style crust and a golden, crumbly topping. By sandwiching a layer of vibrant lemon pie filling between the two, you get a dessert that is punchy, tart, and perfectly set without the need for tempering eggs or measuring out flour.

The high butter content in the cake mix ensures the crust is rich and tender, while the "damp sand" texture of the topping creates those coveted crunchy peaks.

Three ingredients. One pan. Pure lemony magic.

Why These Bars Work

✅ Just 3 ingredients – Lemon cake mix, lemon pie filling, butter – that's it
✅ No eggs – The pie filling sets beautifully on its own
✅ No measuring flour – The cake mix does the work
✅ No tempering – No complicated custard-making
✅ Perfectly tart and sweet – Bright lemon flavor in every bite
✅ Buttery shortbread crust – Rich, tender, and delicious
✅ Crunchy crumb topping – Those golden peaks are irresistible
✅ Crowd-pleaser – Disappears before the main course