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Mar 25, 2022

Key Lime Whoopie Pies

These key lime whoopie pies take the flavors of key lime pie and turn them into these cute little cookie cakes. 

This post is sponsored in conjunction with #SpringSweetsWeek. I received product samples from sponsor companies to help in the creation of the #SpringSweetsWeek recipes.

Key Lime Whoopie Pies on plates.


These key lime whoopie pies are comprised of a Graham cracker flavored cake filled with a buttercream flavored with the juice of fresh key limes. 

The little cakes, which sandwich the amazing key lime buttercream, include a secret ingredient... crushed Graham crackers. Just crush them into fine crumbs and add them to the batter before scooping it onto baking sheets for baking. 

Key Lime Whoopie Pies in casseroles.

I love whoopie pies, including chocolate whoopie pies and red velvet whoopie pies. It's like having a slice of cake in cookie form. 

There are specialty whoopie pie pans with little cavities for baking them, but you really don't need one because the cake batter will mound nicely and bake into perfectly round shapes. 

I baked these on an Anolon baking sheet from one of our giveaway sponsors. Be sure to check out their 5-piece baking set that you can win (along with the rest of the prizes). Enter to win below after the recipe. There are six prize packages, one from from each of our sponsors. 

Key Lime Whoopie Pies on a baking sheet.

How to Make the Graham cakes:

First, combine the dry ingredients in a bowl and whisk. 

Next, cream together the butter and sugars in the bowl of a stand mixer. Add the egg and vanilla and mix. 

After that, mix the flour mixture into the butter mixture in thirds, alternating with buttermilk or plain yogurt mixed with milk. 

Finish by manually stirring in some crushed Graham crackers (I used Nairn's, one of our sponsors) and honey before scooping the batter onto baking sheets and baking. 

Key Lime Whoopie Pies on a wire rack.

To Make the Key Lime Buttercream:

First, juice several key limes. Using real lime juice will give you the best flavor. You will be so surprised at how the lime flavor comes through very strongly. I used key limes from Melissa's Produce

Next, beat butter and powdered sugar together until it is light and fluffy, and then add some cream, the lime juice, lime zest, and a drop of green food coloring (optional), and beat until incorporated. 

For the sugar, I used powdered sugar from Dixie Crystals. They are a sponsor and have been my sugar of choice for years. 

Key Lime Whoopie Pies ingredients.

Once you fill the cakes with the buttercream, dip the edges of the buttercream into sprinkles if you like (I love sprinkles). These sprinkles are called "Bunny Hop" from Sweets and Treats

These key lime whoopie pies are moist and delicious. The buttercream is so flavorful too. 

These are best consumed within 24 hours. If you need to store them longer, keep them in a single layer on a wire rack in a covered container to prevent them from sticking to the pan or each other. 

Key Lime Whoopie Pies in casseroles.

These are pretty much key lime pie in a cookie! 

Welcome to #SpringSweetsWeek 2022 hosted by Heather from Hezzi-D's Books and Cooks!   

Flowers are starting to bloom, the weather is getting warmer, and we're celebrating with spring sweets and a fun giveaway!   

This year 22 food bloggers from around the country are sharing over 75 sweet recipes that are perfect for spring. Say bye bye to the snow and cold weather and get ready to enjoy amazing spring treats like cupcakes, cookies, pies, dessert boards, and even a few beverages!  

Our #SpringSweetsWeek sponsors are helping us give away some great prizes.  Thank you to Dixie Crystals, Melissa's Produce, Anolon, Sweets & Treats, Taylor and Colledge, and Nairn's for your generosity. We have an incredible giveaway with six amazing prizes and would love if you would take a moment to read about it and the prizes that you can win!

Key Lime Whoopie Pies on a wire rack.


Friday #SpringSweetsWeek Recipes

We share recipes from #SpringSweetsWeek on Pinterest! Make sure you follow the board to see all the delicious recipes shared this week.

Key Lime Whoopie Pies on a platter.

Key Lime Whoopie Pies

Key Lime Whoopie Pies
Yield: 22 cookies
Author: Karen's Kitchen Stories
Prep time: 20 MinCook time: 10 MinTotal time: 30 Min
These key lime whoopie pies take the flavors of key lime pie and turns them into these cute little cookie cakes.


For the Cakes
  • 420 grams (3 cups) unbleached all purpose flour
  • 1 1/2 teaspoons baking powder
  • 1/2 teaspoon salt
  • 1/2 cup (1 stick) unsalted butter, room temperature
  • 3/4 cup granulated sugar
  • 3/4 cup packed light brown sugar
  • 1 egg, room temperature
  • 2 teaspoons pure vanilla extract
  • 1 cup buttermilk (or 3/4 cup plain yogurt or sour cream plus 1/4 cup milk), room temperature
  • 2 tablespoons honey
  • 3/4 cup finely ground Graham cracker crumbs (I used Nairn's)
  • Sprinkles to finish the cakes (I used Sweets and Treats)
For the Buttercream
  • 2 cups powdered sugar (plus more if needed) (I used Dixie Crystals)
  • 4 tablespoons (1/2 stick) unsalted butter, room temperature
  • Pinch of salt
  • 3 tablespoons heavy cream
  • 2 1/2 tablespoons fresh key lime juice
  • Zest of one lime (optional)


  1. Heat your oven to 375 degrees F and line three baking sheets with parchment paper.
  2. In a medium bowl, whisk together the flour, baking powder, and salt.
  3. In the bowl of a stand mixer, add the butter and two sugars and beat with the paddle attachment on medium for 3 minutes. Add the egg and vanilla and mix on medium for 3 minutes, scraping down the sides of the bowl as necessary.
  4. Switch the mixer to low and add 1/3 of the flour mixture and mix until just incorporated. Add 1/2 of the buttermilk, and mix. Repeat with 1/3 of the flour mixture, 1/2 of the buttermilk, and 1/3 of the flour mixture.
  5. Using a rubber spatula, gently mix in the honey and Graham cracker crumbs.
  6. Using a tablespoon cookie scoop, portion the batter on the baking sheets 2 inches apart. Bake the cakes for 10 to 12 minutes, one sheet at a time. Cool on a wire rack.
  7. To make the filling, beat the sugar and butter on low speed for about 3 minutes. Add the salt and heavy cream, lime juice, and zest and beat for about 3 minutes. Add more powdered sugar if necessary.
  8. Pipe the filling onto half of the cakes and top with the other half. Dip the sides into the sprinkles as shown.

Nutrition Facts



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whoopie pies
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Recipe adapted from So Sweet! Cookies, Cupcakes, Whoopie Pies, and More by Sur la Table. Currently out of print but available on Kindle and published in 2011. 

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Thank you #SpringSweetsWeek Sponsors: Dixie Crystals, Anolon, Sweets & Treats, Melissa’s Produce, Taylor and Colledge, and Nairn’s for providing the prizes free of charge. These companies also provided the bloggers with samples and product to use for #SpringSweetsWeek recipes. All opinions are my own. The #SpringSweetsWeek giveaway is open to residents of the United States who are 18 years of age or older. All entries for the winner will be checked and verified. By entering you give the right to use your name and likeness. The number of entries received determines the odds of winning. Six (6) winners will be selected. The prize packages will be sent directly from the giveaway sponsors. The #SpringSweetsWeek Bloggers are not responsible for the fulfillment or delivery of the prize packages. Bloggers hosting this giveaway and their immediate family members in their household cannot enter or win the giveaway. No purchase necessary. Void where prohibited by law. This promotion is in no way sponsored, endorsed or administered by, or associated with Facebook, Instagram, Pinterest, Twitter or any other social channel mentioned in the #SpringSweetsWeek posts or entry.

Would you like to comment?

  1. What a great idea to put the oat graham crumbs into the batter! And the filling sounds fantastic too!

  2. What a fun dessert for spring! Those sprinkles are so pretty!

  3. Sprinkles make these so fun and festive! Love the key lime too!

  4. I like that the whoopie pies are made with graham cracker crumbs! Yum!

  5. I love it! Fun and festive with those sprinkles

  6. So cute! Love the cute sprinkles, great recipe too

  7. I've only had chocolate whoppie pies. I'd so be open to key lime!

  8. These look very pretty! Great idea to add the graham crackers too in the cookie batter. Love the flavors!


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