Lemon Bars Get a Cake Mix Makeover—Sweet, Tangy, and Simple

If you’re craving something bright, buttery, and simple, these Lemon Crumble Bars are the perfect pick. Made with a box of yellow cake mix and a layer of tangy lemon curd, they strike that sweet-tart balance in every bite. The soft, golden crumble topping makes them feel homemade—without the hassle.

Why You’ll Love This Recipe

• Buttery crumble topping in every bite
• Uses cake mix for a quick and easy shortcut
• Bright, tangy lemon curd center
• Perfect texture—soft, golden, and just the right amount of sweet
• Easy to make with just five ingredients
• These lemon crumble bars are make-ahead friendly and travel well

Ingredient Notes

• Yellow or white cake mix – Either works well, but yellow adds a richer, buttery flavor
• Butter – Melted butter helps bind the dough and gives it that homemade taste
• Lemon curd – Use a good-quality store-bought lemon curd or homemade if you have it; it’s the star of the bars
• Egg – Helps hold the base layer together
• Powdered sugar – Optional, but adds a pretty, sweet finish once the bars are cooled

Before You Bake

Do I need to refrigerate the lemon curd before spreading it?
No, room temperature lemon curd spreads more easily and helps create an even layer. If yours is refrigerated, just let it sit out for 10–15 minutes first.

Can I double this recipe?
Yes! Use a 9×13-inch pan and increase the baking time by 5–10 minutes, watching for a golden top and set center.

Should I grease the pan if I’m not using parchment?
Yes, if you’re skipping parchment paper, generously grease the pan to ensure the bars don’t stick.

FAQ

Can I use a different fruit curd or jam instead of lemon curd?
Yes, you can swap in raspberry, strawberry, or passionfruit curd for a different twist.

Do lemon crumble bars need to be refrigerated?
They’re fine at room temperature for a day, but for longer storage, refrigerate in an airtight container for up to 4 days.

Can these bars be frozen?
Yes, freeze them in a single layer, then store in a sealed container. Thaw at room temp before serving.

What’s the texture like?
These bars have a soft, cake-like base, a smooth citrus center, and a buttery crumble on top. The edges are slightly chewy while the middle stays tender.

Can I use a gluten-free cake mix?
Yes, a gluten-free yellow or white cake mix works great—just follow the same instructions.

Sprinkle of Fun

These Lemon Crumble Bars were made for breezy days and sunshine. Pack them up for a picnic, enjoy one on the porch with an iced drink, or share a batch at your next backyard hangout. Their bright flavor and easy prep make them the kind of treat that turns an ordinary afternoon into something sweet.