Key Lime Brownies

Key Lime Brownies Recipe – homemade blondies with key lime juice and zest – topped with a layer of sweet key lime glaze. Super simple to make and bursting with fresh key lime flavor. Butter, sugar, flour, eggs, key limes, salt, and powdered sugar. One bite and you will be blown away. If you are a fan of key lime pie, you are going to LOVE these bars.

stack of key lime brownies on a platter with text overlay

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Easy Key Lime Bars Recipe

These Key Lime Brownies are one of our favorite dessert recipes. I’ve been making them for years! They are my go-to recipe for potlucks and cookouts. The brownies are light and not overly sweet. The light lime glaze on top puts these bars over the top. We could not stop eating them. I am making them again this weekend. I can’t stop thinking about them! This recipe is a must for the key lime pie lover in your family! Give these delicious key lime blondies a try ASAP! They are sure to become a new favorite.

plate of key lime brownies with limes

How to Make Glazed Key Lime Brownies

This is an easy recipe to make with a few simple ingredients. In the bowl of an electric stand mixer fitted with the paddle attachment, mix together butter and sugar until light and fluffy. Add eggs and mix until the egg yolks disappear. Add lime juice and two tablespoons of lime zest. Slowly add the dry ingredients to the wet ingredients, mixing until just combined. Pour the batter mixture into the prepared pan and bake in a preheated oven. Cook until a toothpick inserted in the center comes out with just a slight amount of crumbs

Remove the bars from the oven and let the cool before adding the glaze. In a medium bowl, combine powdered sugar, lime juice, and lime zest. Pour glaze on top of the brownies and allow to set up before cutting into bars. 

Helpful Tips & Frequently Asked Questions

  • I highly suggest using fresh key limes in this recipe. I really think it makes a difference. You can use bottled juice, but, since you need fresh lime zest, why not just use fresh lime juice?
    • If you can’t find key limes I recommend Nellie and Joe’s Key West Lime Juice
    • Can substitute regular limes for lime zest.
  • Line the baking pan with parchment paper or aluminum foil to easily remove the brownies from the pan.
  • You can mix the brownie batter in a standing mixer or in a medium bowl with a hand mixer.
  • Variations/Additions:
    • Feel free to add some white chocolate chips to the batter. YUM! 
    • substitute cream cheese frosting for the glaze.
  • Don’t want to use the sweet glaze? You can serve the brownies with a light dusting of powdered sugar.
  • How long do brownies last? Store cut brownie squares in an airtight container at room temperature; they’re best eaten within 1 to 2 days. The pan of uncut brownies wrapped in plastic will keep at room temperature for up to 4 days.
  • Can brownies be frozen? Yes! Bake the brownies and cool completely. Do NOT add the glaze. Wrap the unglazed brownies in plastic wrap and aluminum foil and freeze. When ready to eat, thaw and add the glaze before cutting into squares.
stack of key lime brownies on a platter

Delicious Key Lime Blondies

This is my go-to recipe whenever I need a recipe for a crowd. They are easy to make and everyone LOVES them. You might want to make a double batch. These don’t last long at our house. Want to put these bars over the top? Add a dollop of whipped cream or vanilla ice cream. Holy Moly!

Need more dessert recipe ideas? Here are a few of our favorite key lime desserts from the blog:

No-Bake Key Lime Pie

No-Bake Key Lime Pie Recipe– easy no-bake pie with a creamy, tangy, and tart key lime filling. Super quick to make with only 4…

Key Lime Pound Cake

Key Lime Pound Cake – a simple from scratch pound cake bursting with key lime flavor. This cake only takes…

Key Lime Cheesecake Bars

Key Lime Cheesecake Bars Recipe – super easy dessert for a crowd! Crescent rolls, cream cheese, key lime juice, sugar,…

Key Lime Tarts

Key Lime Tarts recipe – the best key lime pie baked in puff pastry shells. Super easy to make and…

stack of key lime brownies on a platter with text overlay

Key Lime Brownies

Yield: 24 brownies
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Key Lime Brownies Recipe – homemade blondies with key lime juice and zest – topped with a layer of sweet key lime glaze. Super simple to make and bursting with fresh key lime flavor. Butter, sugar, flour, eggs, key limes, salt, and powdered sugar. One bite and you will be blown away. If you are a fan of key lime pie, you are going to LOVE these bars.

Ingredients:

Brownies

Glaze

  • 1 cup powdered sugar
  • 2 Tbsp key lime juice
  • 1 Tbsp lime zest

Instructions:

  • Preheat oven to 350°F. Spray a 9×13-inch cake pan with cooking spray.
  • In the bowl on an electric mixer, cream together butter and sugar until light and fluffy. Add eggs one at a time, beating until fully incorporated. Add the key lime juice and lime zest. Slowly add the flour and salt, mixing until just combined.
  • Pour batter into prepared pan. Bake for 30 minutes. Remove from the oven and cool.
  • To prepare glaze, combine powdered sugar, key lime juice and lime zest. Pour over cooled cake and allow to set up before cutting into bars.

Notes:

  • I highly suggest using fresh key limes in this recipe. I really think it makes a difference. You can use bottled juice, but, since you need fresh lime zest, why not just use fresh lime juice?
    • If you can’t find key limes I recommend Nellie and Joe’s Key West Lime Juice
    • Can substitute regular limes for lime zest.
  • Line the baking pan with parchment paper or aluminum foil to easily remove the brownies from the pan.
  • You can mix the brownie batter in a standing mixer or in a medium bowl with a hand mixer.
  • Don’t want to use the sweet glaze? You can serve the brownies with a light dusting of powdered sugar.
  • How long do brownies last? Store cut brownie squares in an airtight container at room temperature; they’re best eaten within 1 to 2 days. The pan of uncut brownies wrapped in plastic will keep at room temperature for up to 4 days.
  • Can brownies be frozen? Yes! Bake the brownies and cool completely. Do NOT add the glaze. Wrap the unglazed brownies in plastic wrap and aluminum foil and freeze. When ready to eat, thaw and add the glaze before cutting into squares.

Steph

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platter of key lime brownies with text overlay
stack of key lime brownies on a platter with text overlay

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