This post may contain affiliate links. Please see my disclosure policy for more information.

Raspberry Lemon Bars

These Raspberry Lemon Bars are one of those easy dessert recipes that look like they took a lot more effort than they actually did. Starting with a boxed cake mix creates a buttery, soft crust, while a creamy lemon filling and juicy raspberries add the perfect balance of sweet and tangy flavor. Whether you’re making dessert for a family gathering, potluck, picnic, or holiday celebration, these bars are always a crowd favorite.

The best part? You’ll only need a handful of simple ingredients and about 10 minutes of prep time before the oven does the rest of the work.

Why You’ll Love This Recipe

Only 5 simple ingredients
Quick and easy to prepare
Sweet, tart, and creamy
Perfect for spring and summer gatherings
Great make-ahead dessert
Easy to customize with other berries

Ingredients

1 package white or yellow cake mix
½ cup (1 stick) butter, softened
1 large egg
1 (14-ounce) can sweetened condensed milk
¼ cup fresh lemon juice
2 cups fresh raspberries

How to Make Raspberry Lemon Bars

Step 1: Prepare the Pan

Preheat your oven to 350°F. Lightly grease a 9×13-inch baking dish or line it with parchment paper for easier cleanup.

Step 2: Make the Crust

In a large bowl, combine:

Cake mix
Softened butter
Egg

Mix until everything is well combined. The mixture will be thick and resemble cookie dough.

Press the mixture evenly into the bottom of the prepared baking pan. If it’s too sticky, coat your hands with flour.

Step 3: Make the Lemon Filling

In a separate bowl, whisk together:

Sweetened condensed milk
Lemon juice

Once smooth, gently fold in the raspberries. Try not to overmix so the berries stay mostly intact. Save a few whole raspberries to throw on top.

Step 4: Assemble

Pour the lemon and raspberry mixture evenly over the crust.

Step 5: Bake

Bake for 45 to 55 minutes, or until the edges are lightly golden and the center is mostly set. One to two inches in the center should still be slightly jiggly.

The filling will continue to firm up as it cools.

Step 6: Cool

Allow the bars to cool completely at room temperature and then place in the refrigerator. For the cleanest slices, refrigerate for at least one hour before cutting.

Cut into bars and serve.

Tips for the Best Raspberry Lemon Bars

Fresh lemon juice provides the brightest flavor, but bottled lemon juice works in a pinch.
Don’t overbake. The center should have just a slight jiggle when removed from the oven.
Chill before slicing for cleaner edges.
Use parchment paper with overhanging edges to easily lift the bars out of the pan.
Dust with powdered sugar just before serving for a bakery-style finish.

Recipe Variations

Use Frozen Raspberries

Frozen raspberries work well. Add them directly from frozen without thawing to help prevent excess moisture.

Try Different Berries

Swap the raspberries for:

Blueberries
Blackberries
Mixed berries
Chopped strawberries

Make It Extra Lemony

Add 1 teaspoon of fresh lemon zest to the filling for even more citrus flavor.

White Chocolate Twist

Sprinkle white chocolate chips over the raspberry layer before baking for a rich, creamy addition.

Storage

Store leftover Raspberry Lemon Bars in an airtight container in the refrigerator for up to 5 days.

Because of the sweetened condensed milk filling, refrigeration is recommended.

Can You Freeze Raspberry Lemon Bars?

Yes!

Once completely cooled:

Slice into individual bars.
Wrap each bar in plastic wrap.
Place them in a freezer-safe container or freezer bag.

Freeze for up to 3 months.

Thaw overnight in the refrigerator before serving.

Serving Suggestions

These bars are delicious served:

Chilled from the refrigerator
With whipped cream
Alongside vanilla ice cream
Garnished with fresh raspberries
With a sprinkle of powdered sugar
As part of a holiday dessert tray

Frequently Asked Questions

Can I use a different flavor cake mix?

Yes! White or yellow cake mixes are traditional flavors that work well. But lemon, butter, vanilla, strawberry, or even a confetti cake mix can be used.

Can I use frozen raspberries?

Absolutely. Use them straight from the freezer without thawing to minimize extra moisture.

Do I have to refrigerate these bars?

Yes. Since the filling contains sweetened condensed milk, it’s best to store them in the refrigerator after they’ve cooled.

Can I make these ahead of time?

Yes! These bars actually taste even better after they’ve chilled for several hours, making them an excellent make-ahead dessert.

Can I add lemon zest?

Definitely, one teaspoon of freshly grated lemon zest adds even more bright lemon flavor.

Why are my bars still soft?

The bars will continue to set as they cool. For the firmest texture, refrigerate them for at least one hour before slicing.

Print Recipe