
These tangy coconut key lime crinkle cookies blend island-inspired flavors for a sweet-sour treat that'll wow your taste buds. I've whipped these up countless times when I'm craving a sunny lift during gloomy winter days, but they're just as good in summer with a refreshing beverage on the side.
These treats turned into my go-to dessert after I took them to a seaside getaway with my crew. Now they ask for them at every get-together, no matter what time of year it is.
Ingredients
- 2 1/2 cups all purpose flour: creates the backbone for these delicate cookies
- 1 teaspoon baking powder: helps them puff up for that signature crinkle look
- 1/2 teaspoon salt: brings out the taste and cuts the sweetness down
- 8 tablespoons unsalted butter: make sure it's soft at room temp for smooth mixing
- 1 cup granulated sugar: adds sweetness and helps form that crunchy outside
- 1/2 cup sweetened shredded coconut: gives amazing chew and island flavor
- 2 large eggs: add moisture and help everything stick together nicely
- 1/4 cup key lime juice: brings that zingy kick; try to squeeze it fresh
- 1 lime zest: split between the dough and sugar coating for extra zing
- 2 teaspoons coconut extract: boosts that vacation vibe throughout
- 1/2 cup powdered sugar: makes that gorgeous snowy cracked pattern we all love
Step-by-Step Instructions
- Prepare Dry Ingredients:
- Mix the flour, baking powder, and salt in a bowl until they're fully blended. This quick step makes sure your cookies rise evenly.
- Create Butter Base:
- Mix the butter, granulated sugar, and coconut for about 3 minutes until they're fluffy and light. You want it looking creamy and bigger in volume for soft cookies.
- Add Wet Ingredients:
- Drop in eggs one by one, letting each mix in completely. Then add key lime juice, coconut extract, and half the lime zest, beating for around a minute. Don't worry if it looks a bit separated.
- Combine Everything:
- Slowly add the flour mixture on low speed, stopping as soon as it's mixed. Don't overdo it or your cookies will end up tough.
- Chill The Dough:
- Stick it in the fridge for 20 minutes so it firms up for easier handling. This wait also lets the flavors blend and keeps cookies from spreading too much.
- Prepare For Baking:
- Heat your oven to 350°F and put silicone mats or parchment on your cookie sheets. Mix the powdered sugar with leftover lime zest in a small bowl.
- Shape And Coat:
- Scoop 1 1/2 tablespoon chunks of cold dough and roll into balls. Roll them well in the powdered sugar mix until they're white all over. Put them on your sheets with 2 inches between each.
- Bake To Perfection:
- Bake them for 12 to 15 minutes until they've puffed up, started to flatten out, and feel set around the edges. Those pretty cracks will show up during baking and cooling.
- Cooling Process:
- Let them sit on the hot pans for 5 minutes, then move to a cooling rack. This helps them firm up so they don't break apart.

Whenever I taste the key lime and coconut together, I'm instantly back in the Florida Keys where I first tried this combo. My little girl now helps roll the dough balls in sugar, and seeing her tiny fingerprints in the coating makes them taste even better.
Getting The Perfect Crinkle
Want those amazing cracks? Make sure you coat your cookies really well with powdered sugar before they go in the oven. For super dramatic splits, try rolling each ball twice in the sugar, pressing lightly the second time so it sticks better. And always use cold dough from the fridge rather than warm dough for the best cracks.

Storage And Freshness
These goodies stay fresh for about 5 days if you keep them in a sealed container at room temp. The lime flavor actually gets stronger after they sit overnight. To keep them soft, toss in a slice of bread which stops them from drying out. Need to store them longer? Pop cooled cookies in the freezer with parchment between layers for up to 3 months.
Ingredient Substitutions
Can't find key limes? Regular limes work fine though they're a bit less fragrant. In a rush, the bottled key lime juice does the job too. Feel like switching things up? Try using lemon or orange instead. If you want less sweetness, grab unsweetened coconut as a swap. Got gluten-free guests? Just use a good measure-for-measure gluten free flour blend without changing anything else.
Serving Suggestions
These bright treats go great with a cup of tea or coffee in the afternoon. During summer, try putting some vanilla or coconut ice cream between two cookies and freezing them for amazing ice cream sandwiches. They're also fantastic next to a fruit platter or alongside some sorbet when you want a light finish after a big meal.
Common Recipe Questions
- → Can I use regular lime instead of key lime?
Absolutely! Regular limes work fine as a substitute, though they'll give you a milder and less tangy flavor profile.
- → Can I make these cookies ahead of time?
You bet! The dough keeps well in the fridge for up to 24 hours, or you can freeze the finished cookies for about 3 months.
- → Why do the cookies need to be rolled in powdered sugar?
The powdered sugar coating is what creates those pretty cracks on top as the cookies expand during baking.
- → Can I use unsweetened coconut instead?
Sure thing, but your cookies won't be as sweet. You might want to throw in a little extra sugar to balance things out.
- → What other zests can I add as variations?
Try switching things up with lemon or orange zest if you want a different kind of citrus flavor in your cookies.