Best Key Lime Sugar Cookies – Easy 30-Minute Recipe

These key lime sugar cookies deliver a sharp citrus kick balanced by a soft, chewy texture. The glaze sets into a crackly shell that contrasts with the tender crumb, making them a standout dessert for any occasion.

The recipe uses key lime zest and juice for authentic flavor, but regular limes work if you can't find key limes. The dough comes together in one bowl, and the cookies bake in 10 minutes flat.

I've tested this recipe multiple times to ensure the perfect balance of tart and sweet. The key is to not overbake—pull them when the edges are just set.

About the Ingredients

1 3/4 cups (220g) all-purpose flour

Provides structure. Substitute with gluten-free 1:1 flour if needed.

1/2 teaspoon baking soda

Helps cookies spread slightly. Ensure it's fresh for best rise.

1/4 teaspoon salt

Balances sweetness. Use fine sea salt or table salt.

1/2 cup (1 stick / 113g) unsalted butter, softened

Use high-fat butter for chewier cookies. Vegan butter works too.

3/4 cup (150g) granulated sugar

Adds sweetness and helps with browning. You can reduce to 2/3 cup if you prefer less sweet.

1 large egg

Binds ingredients. Use room temperature for better incorporation.

1 tablespoon key lime zest (about 4-5 limes)

Provides intense citrus aroma. If using regular limes, use the same amount.

2 tablespoons key lime juice (freshly squeezed)

Adds tartness. Bottled juice is a last resort; fresh is always better.

1/2 teaspoon vanilla extract

Enhances flavor. Use pure vanilla, not imitation.

1 cup (120g) powdered sugar

For the glaze. Sift to avoid lumps.

1-2 tablespoons key lime juice (for glaze)

Adjust to achieve desired consistency. Add gradually.

Tips & Tricks

Measure flour correctly

spoon into the cup and level off, don't scoop, to avoid dry cookies.

• Use room temperature butter and egg to ensure a smooth dough that mixes evenly.
• Chill the dough for 20 minutes if it's too sticky to handle—this prevents spreading.

Step-by-Step Instructions

1. Preheat Oven

Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper.

2. Mix Dry Ingredients

In a medium bowl, whisk together flour, baking soda, and salt. Set aside.

3. Cream Butter and Sugar

In a large bowl, beat softened butter and granulated sugar until light and fluffy, about 2 minutes. Add egg, key lime zest, juice, and vanilla; mix until combined.

4. Incorporate Dry Ingredients

Gradually add dry ingredients to the wet mixture, mixing until just combined. Do not overmix.

5. Shape Dough Balls

Using a cookie scoop or spoon, form dough into 1.5-inch balls. Place them 2 inches apart on prepared baking sheets.

6. Bake Cookies

Bake for 10-12 minutes, until edges are lightly golden and centers are set but soft. The internal temperature should reach 190°F (88°C) for a soft-baked texture.

7. Cool and Glaze

Let cookies cool on the pan for 5 minutes, then transfer to a wire rack. While still warm, brush or drizzle with glaze made by whisking powdered sugar with 1-2 tablespoons key lime juice until smooth.

8. Let Glaze Set

Allow glaze to set for 10 minutes before serving. The glaze will harden into a shiny, crackly top.

Delicious Variations

• Add 1/2 cup white chocolate chips to the dough for extra sweetness.
• Swap key lime for Meyer lemon for a milder citrus flavor.
• Roll dough in crushed graham crackers before baking for a key lime pie crust vibe.

How to Store Key Lime Sugar Cookies

Frequently Asked Questions

If you love bright citrus desserts, give these key lime sugar cookies a try. They're perfect for summer parties or just because. Happy baking!

Key Lime Sugar Cookies

Make the best key lime sugar cookies with a tangy glaze—soft, chewy, and ready in 30 minutes. A perfect citrus dessert!

★★★★½ 4.8 (187 ratings)

15 minPrep time12 minCook time24Servings145 kcalCalories

Print RecipePin Recipe

🧂 Ingredients

• 1 3/4 cups (220g) all-purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon salt
• 1/2 cup (1 stick / 113g) unsalted butter, softened
• 3/4 cup (150g) granulated sugar
• 1 large egg
• 1 tablespoon key lime zest (about 4-5 limes)
• 2 tablespoons key lime juice (freshly squeezed)
• 1/2 teaspoon vanilla extract
• 1 cup (120g) powdered sugar
• 1-2 tablespoons key lime juice (for glaze)

📋 Instructions

1. 1Preheat Oven — Preheat your oven to 350°F (175°C). Line two baking sheets with parchment paper.
2. 2Mix Dry Ingredients — In a medium bowl, whisk together flour, baking soda, and salt. Set aside.
3. 3Cream Butter and Sugar — In a large bowl, beat softened butter and granulated sugar until light and fluffy, about 2 minutes. Add egg, key lime zest, juice, and vanilla; mix until combined.
4. 4Incorporate Dry Ingredients — Gradually add dry ingredients to the wet mixture, mixing until just combined. Do not overmix.
5. 5Shape Dough Balls — Using a cookie scoop or spoon, form dough into 1.5-inch balls. Place them 2 inches apart on prepared baking sheets.
6. 6Bake Cookies — Bake for 10-12 minutes, until edges are lightly golden and centers are set but soft. The internal temperature should reach 190°F (88°C) for a soft-baked texture.
7. 7Cool and Glaze — Let cookies cool on the pan for 5 minutes, then transfer to a wire rack. While still warm, brush or drizzle with glaze made by whisking powdered sugar with 1-2 tablespoons key lime juice until smooth.
8. 8Let Glaze Set — Allow glaze to set for 10 minutes before serving. The glaze will harden into a shiny, crackly top.

👨‍🍳 Chef's Note: For the strongest lime flavor, use fresh key limes. The zest is essential—don't skip it.

Servings: 24

Cuisine: American

Course: Dessert

Nutrition (per serving): 145 kcal · 1g protein · 22g carbs · 6g fat

Written by Lucas Okafor
Lucas covers personal finance and side hustles, with an emphasis on building income streams without hype. He breaks down money concepts into straightforward, no-nonsense advice.