Sometimes a simple dessert can be the sweetest way to bless someone’s day. These Cake Mix Lemon Bars remind me that hospitality doesn’t have to be complicated to be meaningful. With a boxed cake mix and a few simple ingredients, you can bake up a pan of joy, sweet, lemony bars that bring a sunny smile with every bite.
Sunny Cake Mix Lemon Bars 🍋
This recipe takes everything we love about classic lemon bars and makes it even easier. These easy lemon bars with cake mix start with a box of lemon cake mix that bakes into a soft, buttery crust in just minutes. The creamy, tangy layer on top adds that perfect lemon sweetness that everyone loves. They’re ideal for sharing with friends, taking to a potluck, or serving as a quick dessert when you want something bright and cheerful. With a boxed cake mix, there is no stress, just simple steps that lead to a homemade-tasting treat ready to enjoy warm from the oven.
These sound. amazing. I love simple recipes.
—Linda Reese
Ingredient Notes
Here’s a quick overview of the key ingredients for this recipe. For the full list of ingredients and exact measurements, be sure to check the recipe card at the bottom of this post.
- Lemon cake mixUse a standard 15.25-ounce box. Lemon gives the best zesty flavor, but you can use yellow cake mix and add 1 teaspoon of lemon extract if that’s what you have.
- ButterMelted and slightly cooled. Unsalted is best for flavor control.
- EggsOne egg for the crust and two for the filling, all at room temperature for smooth mixing.
- Cream cheeseUse full-fat, softened to room temperature. This keeps the filling creamy and rich.
- Powdered sugarSweetens and thickens the filling, and sprinkle some on top after baking.
- Lemon zestFreshly grated adds brightness and extra lemon flavor.
How to Make Cake Mix Lemon Bars
Make the Crust
In a large bowl, combine the lemon cake mix, 1 egg, and melted butter. Stir until smooth and dough-like.
Finish Bottom Layer and Whip Cream Cheese
Press this mixture evenly into the prepared pan to form a firm base. Pro Tip: If the dough feels too sticky, dust your fingertips lightly with powdered sugar before pressing it into the pan.
In another bowl, beat the cream cheese until soft and smooth.
Finish Making the Cream Cheese Filling
Add in the 2 beaten eggs, vanilla extract, and lemon zest. Gradually mix in the powdered sugar, one cup at a time, until everything is creamy and well combined.
Bake and Top with Powdered Sugar
Spread the filling evenly over the crust.
Bake for 40 to 45 minutes, until the edges are golden brown and the center is just set. Let the bars cool completely in the pan before cutting. Once cooled, sprinkle generously with powdered sugar and slice into squares.
Pro Tip: Chill the bars for 30 minutes before slicing for clean edges.
Variations, Substitutions, and Recipe Tips
Dietary Modifications: To make this recipe gluten-free, use a gluten-free lemon cake mix. For dairy-free, substitute the cream cheese with a plant-based version. Note that the texture will be slightly different.
Flavor Enhancements: Drizzle the bars with a simple lemon glaze (powdered sugar + lemon juice), or top with fresh raspberries for a pretty finishing touch.
Add-In Options: Stir in a 1/4 cup of shredded coconut for a tropical note, or mix in 1/3 cup white chocolate chips for added sweetness.
Simple Substitutions: No lemon cake mix? Use yellow cake mix plus 1 teaspoon lemon extract.
Tips for Recipe Success: Make sure the cream cheese is completely softened before mixing so the filling turns out smooth and creamy. Be careful not to overbake the bars, because they should stay soft and slightly gooey in the center. Let them cool fully before cutting, which helps the layers set and gives you clean, neat slices every time.
That’s normal. The soft center settles as it cools, giving the bars their classic creamy texture.
Hospitality Challenge
Bake a double batch of the Sunny Cake Mix Lemon Bars and package them in small boxes or baggies with a cheerful note that includes your phone number and an offer to pray for any needs this week. Drop them off at an older neighbor’s home, a busy mom, or give them to a coworker who could use encouragement. If you can, linger a few minutes to ask how they are doing. Really listen.
More Lemony Recipes
- Cool Whip Lemon Cookies with Just 4 Ingredients
- Leomon Chicken
- Decadent Lemon Jello Poke Cake
- Lemon Ginger Energy Balls Recipe
- Leomon Galic Chicken Wings
These Cake Mix Lemon Bars are the perfect example of simple, joyful baking, proof that something easy can still be special. If you have any questions about making this recipe, feel free to ask in the comments below. I’m here to help!
Creamy Cake Mix Lemon Bars
Ingredients
- 15.25 ounces lemon cake mix, boxed
- 1 egg, large (for crust)
- 1/2 cup butter, melted
- 8 ounces cream cheese, softened to room temperature
- 2 eggs, beaten, large (for filling)
- 1 teaspoon vanilla extract
- 3 1/2 cups powdered sugar
- 2 teaspoon lemon zest, freshly grated, optional for extra flavor
- Additional powdered sugar, for sprinkling on top
Instructions
Prepare the Pan and Oven
- Preheat oven to 350 degrees Fahrenheit.
- Grease a 9 × 13 inch baking dish with butter or nonstick spray.
Make the Crust
- In a large mixing bowl, combine the lemon cake mix, 1 egg, and melted butter.15.25 ounces lemon cake mix, 1 egg, 1/2 cup butter
- Stir until smooth and dough-like.
- Press this mixture evenly into the bottom of the prepared baking dish.
Make the Cream Cheese Filling
- In another mixing bowl, beat the cream cheese until smooth.8 ounces cream cheese
- Add in the 2 beaten eggs, vanilla extract, and lemon zest and combine.2 eggs, 1 teaspoon vanilla extract, 2 teaspoon lemon zest
- Adding one cup at a time, mix in the powdered sugar. Mix until creamy and well combined.3 1/2 cups powdered sugar
- Spread the cream cheese mixture evenly over the crust.
Bake
- Bake in the preheated oven for 40 to 45 minutes, or until the edges are golden brown.
- The center may sink slightly—this is normal.
Cool and Serve
- Let the bars cool completely in the pan.
- Sprinkle with additional powdered sugar before cutting into squares.Additional powdered sugar
- Enjoy!
Gina’s Notes and Tips
For more lemon flavor: Add an extra teaspoon of lemon zest to the filling. You could also stir in a 1/3 cup of shredded coconut for a tropical note
Storage and Reheating
Room Temperature: Store in an airtight container for up to 2 days.Fridge: Keeps fresh up to 5 days. Serve chilled or at room temperature.
Freezer: Wrap individual pieces tightly with parchment paper and then put them into an air-tight container. Freeze for up to 2 months. Thaw overnight in the fridge.
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These sound. amazing. I love simple recipes
Hi,
How do I make the glaze? How much sugar and how much lemon juice??
Thank you so much!
Hey Julie, Here is how to make the lemon juice glaze.
You need
1 cup powdered sugar
2 to 3 tablespoons fresh lemon juice
How to make it
Add the powdered sugar to a small bowl.
Start with 2 tablespoons lemon juice and whisk until smooth.
Add more lemon juice a teaspoon at a time until it reaches your perfect drizzle consistency.
That’s it. If it pours slowly off the spoon, you nailed it.
Quick tips
Too thick? Add a few drops of lemon juice.
Too thin? Sprinkle in more powdered sugar.
Want extra lemon flavor without thinning it out? Add a pinch of lemon zest.
This glaze is perfect for pound cake, loaf cakes, muffins, scones, or a quick drizzle over sugar cookies when you want something simple that still feels special. And yes, people will ask for the recipe every single time.
The lemon bars are very good & I will definitely make them again.
I used a 9×9 pan & increased the baking time to 55 minutes & added an additional tsp. of zest, they came out PERFECT & delicious!
Debra, Thanks for sharing, I’m glad you enjoyed them!