Tangy Key Lime Cookie Recipe: Zesty Citrus Shortbread Cookies

The best chewy key lime cookies—soft drop cookies made with cream cheese and graham cracker crumbs, filled with a simple homemade key lime curd. All the bright, tangy flavor of key lime pie in cookie form.

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These cookies are a celebration of citrus—specifically key limes. Bright, tart, and aromatic, they bring a little sunshine to your day.

This key lime cookie recipe is a twist on lemon bar cookies, with graham cracker crumbs folded into the dough and an intensely zesty key lime curd piped into each thumbprint. The result is a soft, chewy cookie with unmistakable pie-like flavor.

why you will love these easy thumbprint cookies

Bold flavor — fresh key lime juice and zest give vibrant citrus notes.
Soft and chewy — cream cheese in the dough creates a tender, slightly tangy texture.
Quick curd — the filling cooks on the stovetop in just a few minutes.
Seasonal favorite — perfect for spring and summer gatherings or festive holidays.

key lime cookie with a bite missing sitting on top of another cookie

ingredients and substitutions

Please scroll to the recipe card at the end for exact measurements and full baking directions.

ingredients for the key lime filled cookies

All-purpose flour — used in the dough and to help thicken the curd.

Graham crackers — crushed into crumbs to echo the classic key lime pie crust. Crush in a food processor or place in a sealed bag and roll with a pin.

Sugar — granulated sugar for both dough and curd; confectioners’ sugar softens the cookie texture.

Baking powder, cornstarch, and kosher salt — provide lift, tenderness, and balance.

Eggs — two whole large eggs plus one yolk; room temperature eggs combine more easily.

Butter and cream cheese — use room temperature unsalted butter and full-fat block cream cheese for best texture and flavor.

Key lime juice and zest — zest first, then juice. Four key limes provide a bright curd; for extra punch, add the zest of one or two more limes to the cookie dough with the sugars.

stack of cookies on a plate with a bowl of limes in the background

how to make the easiest lime curd filling

Combine granulated sugar, flour, cornstarch, baking powder, kosher salt, key lime zest, one large egg, and fresh key lime juice in a small saucepan. Whisk over medium-low heat for 2–3 minutes until the mixture thickens and reaches about 190°F on an instant-read thermometer. Remove from heat, spread the curd in a shallow freezer-safe dish so it cools quickly, and place it in the freezer while you prepare the cookie dough.

lime curd ingredients mixed in a saucepan prior to cooking — The key lime curd ingredients whisked together before cooking.

hand holding a thermometer showing curd cooked to a high enough temperature — The curd cooks in 2–3 minutes and should reach about 190°F.

key lime curd after it's been cooked in a saucepan — Key lime curd after cooking.

Remember to pin this recipe to Pinterest!

how to make tangy key lime cookies

Line two half-sheet baking pans with parchment. In a medium bowl whisk together the flour, crushed graham crackers, baking powder, and kosher salt; set aside.

In a mixer fitted with the paddle attachment, cream room-temperature butter on medium for 30–60 seconds, then add cream cheese and beat another minute. Add granulated and confectioners’ sugar and beat until smooth. Mix in the egg, egg yolk, and vanilla until fluffy.

With the mixer on low, add half the dry ingredients, scrape the bowl, then add the remaining flour mixture. Mix only until the last streaks of flour are incorporated; the dough will be thick and cake-like.

butter and cream cheese beat together in a mixing bowl — Butter and cream cheese creamed together.

Butter, cream cheese, sugars and eggs beat until fluffy in a mixing bowl — Dough after sugars and eggs are incorporated; fluffy and light.

key lime cookie dough in a mixing bowl — Dough with a thick, cake-like texture.

Scoop the dough using a 2-tablespoon scoop and place balls 2 inches apart on the lined pans. Chill the pans while the oven preheats to 350°F (about 20 minutes is ideal).

Using the back of a tablespoon, press a thumbprint into the center of each chilled dough ball (dip the spoon in a little granulated sugar if the dough sticks). Remove the curd from the freezer and fill each thumbprint with about 1 teaspoon of curd.

Bake 10–12 minutes, until the edges are set. Let the cookies cool on the pan for 10 minutes before transferring to a wire rack to cool completely. Optional: immediately after baking push each cookie slightly inward (“cookie scoot”) for a taller shape, and sprinkle with crushed graham cracker crumbs or dust with confectioners’ sugar and lime zest once fully cooled.

cookie dough on a baking sheet — Allow space between cookies — they spread a little while baking.

thumbprints being made with the back of a tablespoon — Make a centered thumbprint and add a teaspoon of curd.

key lime cookies on a cooling rack — Cookies after baking; scooted (top) and unscooted (bottom) for comparison.

frequently asked questions

what is the difference between a lime and a key lime?

Key limes are smaller and often more yellow than regular limes, with thinner skin and more seeds. Their flavor is typically more tart and aromatic, and they became popular through key lime pie from the Florida Keys.

how do you zest a key lime?

Be careful with small fruit. A microplane zester produces fine zest without the bitter pith and is ideal for key limes.

can I zest citrus without a zester?

Yes—use the fine side of a box grater, but proceed slowly to avoid scraping your fingers. The zest will be slightly coarser but will work in a pinch.

can I use regular lime?

Regular limes will work if key limes are unavailable, though key limes are tangier. If using bottled key lime juice, pair it with fresh zest from a regular lime to boost aroma.

key lime cookies piled on a baking sheet with key limes

how to store

Store cooled cookies in an airtight container in the refrigerator for up to 5 days. Place parchment between stacked layers to protect the curd. Cookies also freeze well for up to 3 months—thaw in the refrigerator before serving.

Snap a photo and tag @twosugarbugs on Instagram if you make these Key Lime Cookies — it’s a joy to see your versions!

more citrus desserts

Mom’s Lemon Bars
Orange Creamsicle Cookies
Blackberry Lemon Scones
Lemon Sugar Cookies

If you make this recipe (or any recipe from Two Sugar Bugs), please leave a review and a star rating—I read every comment and love hearing from you!

Yield: 18 cookies

Key Lime Cookies

Drop cookies made with cream cheese and graham crackers, filled with a quick homemade key lime curd for bright, tart flavor.

Prep Time
20 minutes

Bake Time
12 minutes

Chill Time
20 minutes

Total Time
52 minutes

Ingredients

easy lime curd

½ cup granulated sugar (100g)
2 tablespoons all-purpose flour (15g)
1 teaspoon cornstarch
¼ teaspoon baking powder
¼ teaspoon kosher salt
1 teaspoon key lime zest (from four key limes)
1 large egg
2 tablespoons fresh key lime juice (30mL)

cookies

1 ¼ cups all-purpose flour (156g)
½ cup graham crackers, crushed, 4 full sheets (60g)
2 teaspoons baking powder
¼ teaspoon kosher salt
½ cup unsalted butter, room temperature (113g)
3 ounces cream cheese, room temperature (84g)
¾ cup granulated sugar (150g)
½ cup confectioners’ sugar (60g)
1 large egg, room temperature
1 large egg yolk, room temperature
1 teaspoon pure vanilla extract
Extra graham cracker crumbs and confectioners’ sugar for dusting, optional

Instructions

For the key lime curd: Whisk together the granulated sugar, flour, cornstarch, baking powder, kosher salt, key lime zest, one large egg, and fresh key lime juice in a small saucepan.
Cook over medium-low heat, whisking constantly for 2–3 minutes until thickened and about 190°F. Remove from heat and spread in a shallow freezer-safe dish to cool quickly. Freeze briefly while you make the dough.
For the cookies: Line two half-sheet pans with parchment. Whisk the flour, crushed graham crackers, baking powder, and salt in a medium bowl and set aside.
Cream the room-temperature butter in a mixer on medium for 30–60 seconds. Add cream cheese and beat 1 minute more. Add granulated and confectioners’ sugar and beat until smooth, about 2 minutes.
Add the egg, egg yolk, and vanilla; beat until fluffy, about 1 minute, scraping the bowl once.
On low speed, add half the dry ingredients and mix until barely incorporated, scrape the bowl, then add the rest. Mix until only a few streaks remain and finish with a spatula.
Scoop 2-tablespoon portions onto the prepared pans, spacing 2 inches apart. Chill while preheating oven to 350°F (about 20 minutes).
Make a thumbprint in each dough ball with the back of a tablespoon (dip the spoon in sugar if it sticks). Fill each indent with 1 teaspoon of frozen curd.
Bake 10–12 minutes until edges are set. Cool on the pan 10 minutes, then transfer to a wire rack to cool completely. Optionally scoot hot cookies inward and sprinkle with graham crumbs.
Once cooled, dust with confectioners’ sugar and extra lime zest if desired.

Notes

You will have a couple tablespoons of curd leftover—delicious on ice cream or eaten by the spoonful. Add extra key lime zest to the dough for more punch. Keep the thumbprint centered so the curd stays contained while baking. Store cookies in an airtight container in the refrigerator up to 5 days; parchment between layers prevents sticking. Cookies freeze well up to 3 months.

Nutrition Information:

Yield:

Serving Size:

1

Amount Per Serving:
Calories: 223Total Fat: 9gSaturated Fat: 5gCholesterol: 60mgSodium: 140mgCarbohydrates: 35gSugar: 25gProtein: 3g

The nutrition information is an estimate only and may not be entirely accurate.