Lemon Coconut Bars with Cake Mix (7 Ingredients, Zero Leftovers)
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If you’re looking for a dessert that gets people talking, sneaking seconds, and asking for the recipe before they’ve even finished their first bite — this is it. These Lemon Coconut Bars are rich, gooey, and layered with bright citrus flavor and sweet toasted coconut. They come together in about 45 minutes, start with a box of lemon cake mix, and taste like something you spent hours making from scratch.
Think of them as the love child of a gooey butter cake and a classic lemon bar — but easier than either. I’ve brought these to potlucks, Easter brunches, baby showers, and holiday cookie exchanges. Every single time, the pan is empty before the event ends.
Table of contents
Why You’ll Love This Recipe
- Only 7 ingredients — and one of them is a box of cake mix
- No fancy equipment — just two bowls and a hand mixer
- Crowd-pleasing flavor — bright lemon + sweet coconut is a combination that works on everyone
- Make-ahead friendly — these actually taste better after a few hours in the fridge
- Gooey, fudgy texture — not cakey, not crispy. Just perfectly soft and rich.
What Are Lemon Coconut Bars?
Lemon Coconut Bars are a shortcut dessert bar inspired by the classic St. Louis gooey butter cake. The base is a pressed crust made from lemon cake mix, eggs, and butter — dense, slightly chewy, and full of citrus flavor. The top layer is a creamy, almost custard-like filling made from cream cheese, powdered sugar, eggs, and sweetened coconut flakes.
When baked, the top sets just enough to hold its shape while staying gloriously gooey in the middle. The edges get lightly golden, the coconut toasts up beautifully, and the whole thing slices into clean, gorgeous bars once it’s been chilled.
They’re not technically lemon bars (there’s no curd involved), but lemon lovers will absolutely adore them. And coconut fans? Don’t even get me started.
Ingredients You’ll Need
Here’s everything that goes into these bars:
- Lemon cake mix (13 oz box) — This is your shortcut. It gives the crust incredible lemon flavor with zero effort.
- 4 eggs, divided — Two go into the crust, two go into the filling. Dividing them is the key to two very different textures in one pan.
- ½ cup melted butter — Binds the crust and adds richness.
- 4 cups powdered sugar — Sweetens the filling and gives it that dense, fudgy quality.
- 8 oz cream cheese, softened — The backbone of the filling. Make sure it’s fully softened so the filling is perfectly smooth.
- 7 oz package sweetened flaked coconut — Adds chew, texture, and that toasted coconut flavor throughout.
- 1 tsp coconut extract (or vanilla) — Coconut extract gives a stronger, bakery-style coconut punch. Vanilla is more subtle and equally delicious.
How to Make Lemon Coconut Bars
Step 1: Make the Crust
Preheat your oven to 350°F and grease a 9×13-inch baking dish. Line it with parchment paper for the easiest removal — these bars are gooey and you’ll thank yourself later.
In a large bowl, stir together the lemon cake mix, 2 of the eggs, and the melted butter until fully combined. The mixture will be thick — almost like a stiff cookie dough. Press it evenly into the bottom of your prepared pan to form the crust layer.
Step 2: Make the Filling
In a separate bowl, beat the softened cream cheese, powdered sugar, and remaining 2 eggs with a hand mixer until the mixture is completely smooth and creamy — no lumps. This is worth taking an extra minute on. Any lumps of cream cheese will affect the texture of the finished bars.
Fold in the sweetened coconut flakes and coconut (or vanilla) extract and stir until evenly distributed.
Step 3: Bake
Pour and spread the coconut cream cheese filling evenly over the crust. Bake at 350°F for 35 to 40 minutes, until the edges are lightly golden and the center is mostly set but still has a gentle jiggle to it.
Do not overbake. The center should look slightly underdone when it comes out of the oven — it will continue to set as it cools.
Step 4: Cool and Chill
Let the bars cool on the counter for 30 minutes (still in the pan), then transfer to the refrigerator for at least 2 hours before slicing. Chilling is not optional — it’s what transforms these from a soft, hard-to-cut slab into clean, beautiful bars.
Slice into a 3×4 grid for 12 generous servings, or cut smaller for a bigger crowd.
Tips for Perfect Lemon Coconut Bars Every Time
Use softened cream cheese. Cold cream cheese won’t beat smooth, which means lumpy filling. Set it out at least 30 minutes before you start baking.
Line your pan with parchment. Grease the pan first so the parchment sticks, then let the edges hang over the sides. This creates a sling that makes lifting the bars out completely effortless.
Don’t skip the chill time. The bars need those 2 hours in the fridge to fully firm up and develop their best flavor. (They’re honestly even better on day 2.)
Watch for the jiggle, not the color. The coconut on top will start browning before the center is done. Go by the jiggle — a slight wobble in the center is perfect. A loose, liquid-y center needs more time. A fully set, firm center means you’ve gone too far.
Use coconut extract if you can find it. It makes such a difference in the depth of coconut flavor. Most grocery stores carry it in the baking aisle near the vanilla extract.
Serving and Storage
Serve these bars cold or at room temperature. Chilled straight from the fridge is honestly the best way — the texture is firmer, the flavors are more concentrated, and they hold their shape beautifully.
Store leftovers in an airtight container in the refrigerator for up to 5 days. They keep well and actually improve overnight as the flavors meld.
Want to freeze them? Absolutely. Wrap individual bars in plastic wrap and freeze for up to 2 months. Thaw overnight in the refrigerator before serving.
Variations to Try
Lime Coconut Bars — Swap the lemon cake mix for lime (or white cake mix + lime zest) for a tropical twist.
Toasted Coconut Bars — Toast the coconut flakes in a dry pan before folding them in for a deeper, nuttier flavor.
Pineapple Coconut Bars — Add ½ cup of well-drained crushed pineapple to the filling for a piña colada vibe.
White Chocolate Drizzle — Once the bars are chilled and cut, drizzle with melted white chocolate for a bakery-worthy finish.
Perfect Occasions for These Bars
- Easter and spring brunches Potlucks and cookouts (they travel beautifully in the pan)
- Baby and bridal showers
- Holiday cookie exchanges
- Bake sales
- Anytime you need to bring something and want people to be impressed
Frequently Asked Questions
Yes! White cake mix makes a more neutral base that lets the coconut shine. Yellow cake mix works too. Strawberry or orange cake mix would make a fun variation.
Absolutely — these are an ideal make-ahead dessert. Bake them the day before, refrigerate overnight, and slice right before serving.
Overbaking is almost always the culprit. Pull them from the oven when the center still has a slight jiggle, and make sure you’re letting them chill fully before cutting.
You can, but you’ll need two 9×13 pans rather than one larger pan to ensure even baking.
Sweetened coconut is recommended. It adds moisture and helps the filling stay gooey. Unsweetened coconut will result in a drier, less rich bar.
If you make these Lemon Coconut Bars, I’d love to hear how they turned out! They’re one of those recipes that looks impressive but comes together so easily — and I hope they become a staple in your kitchen the way they have in mine.
Drop a comment below and let me know if you tried any of the variations, or if you brought them somewhere and watched them disappear.
⭐ Don’t forget to leave a star rating too — it helps other readers find this recipe!
Lemon Coconut Bars
Ingredients
- 13 oz box lemon cake mix
- 4 eggs, divided
- ½ cup melted butter
- 4 cups powdered sugar
- 8 oz cream cheese, softened
- 7 oz pkg sweetened flaked coconut
- 1 tsp coconut extract, or vanilla extract
Directions
- Preheat oven to 350 degrees F. Grease a 9×13-inch baking dish or line it with parchment paper and set aside.
- In a large mixing bowl, stir together the lemon cake mix, 2 eggs, and melted butter until fully combined.
- Press the cake mixture evenly into the bottom of the prepared baking dish to form the crust layer.
- In a separate mixing bowl, beat together the powdered sugar, remaining 2 eggs, and softened cream cheese with an electric mixer until smooth and creamy.
- Stir in the sweetened flaked coconut and coconut extract.
- Spread the coconut mixture evenly over the crust layer.
- Bake for 35 to 40 minutes or until the edges are lightly golden brown and the center is mostly set but still slightly gooey in the middle.
- Remove from the oven and cool on the counter for 30 minutes.
- Refrigerate for at least 2 hours before slicing into bars and serving.
Notes
- The center should still jiggle slightly when removed from the oven. Overbaking can make the bars dry instead of gooey.
- Coconut extract gives these bars a stronger bakery-style coconut flavor, but vanilla extract works well too.
- Store leftovers covered in the refrigerator for up to 5 days.
- These bars are delicious chilled straight from the fridge.
Nutrition Facts
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