Easy 3-Ingredient Lemon Bars (Quick Cake Mix Dessert)
These 3-ingredient lemon bars are the kind of easy dessert that disappears fast at any gathering. Bright, sweet, and irresistibly tangy, they’re made with a simple shortcut—boxed cake mix and canned lemon pie filling—so you can whip them up with almost no effort.
This recipe is a classic potluck dessert favorite, especially popular in Midwestern kitchens where practical, crowd-pleasing dishes reign. The buttery cake mix creates a soft, crumbly crust and topping, while the lemon filling bakes into a glossy, vibrant layer that delivers bold citrus flavor in every bite.
Whether you’re heading to a family gathering, church supper, or need a last-minute dessert, these lemon bars are a reliable go-to.
Why You’ll Love These Lemon Bars
- Only 3 ingredients
- Super quick and beginner-friendly
- Perfect for potlucks and parties
- Bright lemon flavor with a buttery crust
- Easy to transport and serve
Ingredients
- 1 box (15.25–16.5 oz) lemon cake mix
- 1/2 cup (1 stick) unsalted butter, melted
- 1 can (21 oz) lemon pie filling
How to Make 3-Ingredient Lemon Bars
- Preheat oven to 350°F (175°C) and grease a 9×13-inch baking dish.
- In a bowl, mix the dry cake mix with melted butter until crumbly.
- Press 2/3 of the mixture into the bottom of the dish to form the crust.
- Spread lemon pie filling evenly over the crust.
- Sprinkle remaining crumb mixture over the top.
- Bake for 25–30 minutes, until lightly golden and bubbling at the edges.
- Cool completely, then refrigerate for 1–2 hours for cleaner slices.
- Cut into squares and serve.
Serving Suggestions
These lemon bars are best served:
- Chilled or at room temperature
- Cut into small squares for easy grabbing
- With coffee or black tea to balance sweetness
For a fuller dessert spread, pair them with:
- Fresh berries or fruit salad
- A light dusting of powdered sugar
- A dollop of whipped cream for extra indulgence
Tips for Perfect Lemon Bars
- Let bars cool completely before slicing for clean edges
- Chill before serving for the best texture
- Wipe your knife between cuts for neat squares
- Bake slightly longer for firmer bars (great for buffets)
Variations
- Use yellow or white cake mix for a milder flavor
- Add fresh lemon juice or zest for extra tanginess
- Mix in shredded coconut or chopped nuts for texture
- Dust with powdered sugar for a bakery-style finish
Storage & Make-Ahead Tips
- Refrigerator: Store up to 4 days in an airtight container
- Freezer: Freeze for up to 2 months
- Make ahead: Perfect to prepare the day before serving
