These are shortbread-based bars with a tangy lime curd filling and a layer of toasted unsweetened coconut on top — think lemon bars, but brighter and with more texture. Each bar comes in at 327 calories and the whole batch takes under an hour of active work, plus chilling time. They slice cleanly, hold their shape at room temperature for a few hours, and the recipe doubles without any fuss.
Before you start
Two things actually matter here. First, use cold butter for the shortbread and work it in quickly — warm butter turns the crust greasy and dense instead of crumbly and tender. If your kitchen runs hot, cube the butter and put it back in the freezer for ten minutes before you start. Second, pour the lime filling onto a hot crust, not a cooled one. Pulling the crust from the oven and immediately adding the filling helps the two layers bond as they finish baking together; if the crust cools first, you often get a clean separation when you cut the bars. Neither step is difficult, but skipping either one is the most common reason these bars disappoint.
Substitutions that actually work
- Lime juice: Bottled key lime juice works in a pinch and gives a slightly more floral result. Avoid standard bottled Persian lime juice — it tastes flat once baked.
- Unsalted vs. salted butter in the crust: The recipe calls for unsalted butter with added salt. If you only have salted butter, skip the added salt and the crust will still be fine.
- Unsweetened coconut flakes: Sweetened flakes will make the topping noticeably sweeter and they toast faster, so watch them closely. Unsweetened is the better call here.
- Eggs: No reliable egg-free swap exists for this filling — the eggs are doing the structural work of setting the curd. This one is not easily made vegan.
Storage and freezing
Once fully cooled and topped with coconut, cover the bars tightly and refrigerate for up to 4 days — they actually cut more cleanly on day two after a full overnight chill. For freezing, skip the coconut topping and freeze the cut bars in a single layer until solid, then transfer to an airtight container with parchment between layers; they keep well for up to 2 months. Thaw overnight in the fridge and add the toasted coconut just before serving, otherwise it softens in the freezer. If you’re baking ahead for a party or sale, the freeze-without-topping method is the most reliable approach.
Common problems and fixes
- Filling is rubbery or spongy: Overbaking is the cause. The filling should look just set at the edges with a very slight wobble in the center when you pull it — it firms up as it cools. Even two or three extra minutes in the oven pushes it past creamy into rubbery.
- Crust is soggy under the filling: This usually means the crust didn’t bake long enough in the first stage. The edges should be visibly golden, not just dry-looking, before you add the filling.
- Bars fall apart when sliced: The bars need to be fully cold before cutting — not just room temperature. Use a sharp knife and wipe it clean between cuts. A warm or wet knife drags the filling and breaks the crust.
- Filling weeps or looks wet after refrigerating: A small amount of condensation on the surface is normal when cold bars meet warm air. Pat gently with a paper towel before plating. If there’s significant pooling, the filling was likely underbaked.
- Coconut falls off when serving: The toasted coconut is pressed onto the bars after baking, so it sits loosely on top. Skip the coconut garnish — not worth the extra dish — if you’re stacking bars for transport. Press it on firmly right before serving instead.
Toasted Coconut Lime Bars
Equipment
- Oven
- 9x9 inch baking pan
- Mixing Bowls
- Whisk
- Spatula
- Parchment Paper
Ingredients
For the Shortbread Base:
- 1 cup all-purpose flour sifted
- ¼ cup granulated sugar
- ¼ teaspoon salt
- ½ cup unsalted butter cold and diced
For the Filling:
- 3 large eggs
- 1 cup granulated sugar
- ½ cup fresh lime juice about 4 limes
- 1 tablespoon lime zest finely grated
- ½ teaspoon baking powder
- ¼ cup toasted coconut flakes unsweetened
Instructions
- Preheat your oven to 350°F (175°C). Line a 9x9 inch baking pan with parchment paper, ensuring some overhang for easy removal later.
- In a mixing bowl, combine 1 cup of all-purpose flour, 1/4 cup of granulated sugar, and 1/4 teaspoon of salt. Add the diced cold unsalted butter, using your fingers to combine until the mixture resembles coarse crumbs.
- Firmly press the mixture into an even layer at the bottom of the prepared pan. Bake for 12-15 minutes or until the edges are lightly golden.
- While the base bakes, whisk together the eggs, 1 cup of granulated sugar, 1/2 cup of fresh lime juice, lime zest, and 1/2 teaspoon of baking powder in a bowl until smooth.
- Pour the lime mixture over the hot crust and return to the oven. Bake for another 10-12 minutes, until the filling is set and doesn't jiggle in the center.
- Let the bars cool completely in the pan. Once cooled, sprinkle with toasted coconut flakes. Lift from the pan using the parchment overhang, slice into bars, and serve.
Notes
Lori’s Tips:
- For an extra burst of flavor, add a tablespoon of finely chopped fresh mint to the filling.
- If you prefer a sweeter note, dust the finished bars with powdered sugar before serving.
Nutrition
Common questions
Can I double this recipe for a larger batch?
Yes, and a 9×13 inch pan works well for a double batch. Baking times stay roughly the same, but check the filling a minute or two early since a wider, shallower layer can set faster.
Do I have to use fresh lime juice, or can I use bottled?
Fresh juice gives the best flavor, but bottled key lime juice is a workable substitute. Standard bottled Persian lime juice tends to taste dull after baking, so if you go bottled, key lime is the better option.
How do I toast the coconut if I don’t want to use a separate pan?
Spread the coconut flakes on a small baking sheet and toast them in the same 350°F oven for 5 to 7 minutes while the crust bakes — they’ll be done well before you need them. Stir once halfway through and watch closely, because unsweetened flakes go from golden to burnt quickly.
Can I make these a day ahead?
Yes, and they’re actually easier to slice cleanly after an overnight chill. Store them covered in the fridge and add the toasted coconut the day you plan to serve them so it stays crisp.
My filling looks set but still jiggles a lot — is it done?
A slight wobble in the very center is fine; the filling continues to set as it cools. If the entire surface jiggles like liquid, give it another 2 minutes and check again. Don’t rely on color alone — the filling doesn’t brown.
Can I use a different size pan if I don’t have a 9×9?
An 8×8 pan works and gives you slightly thicker bars; add 2 to 3 minutes to both baking stages and watch for the same visual cues. A 9×13 without doubling the recipe will produce very thin bars that overbake easily, so only use it with a doubled batch.
If you liked this one
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- Zesty Lemon Thyme Shortbread Bars
- Tropical Coconut Cardamom Ice Cream
- Tropical Coconut Tres Leches Cake