Key Lime Cupcakes


Look at me being on top of things! I’m getting some St. Patty’s Day recipes up on the blog so you can make an Irish feast for your friends and family! Last year I made some Lucky Leprechaun Treats Click here for the recipe! Those are pretty fun, especially if you have kids and love Lucky Charms! Yum!


Here’s what I learned making these cupcakes:

Key limes are adorable.

Key limes are a super duper pain in the ass to work with.

Do not try to juice them in a juicer. Because that rind is super bitter.

Likewise, maybe zesting them was a big mistake (also a major pain in the ass)

So I have adjusted the recipe below based on what I think will help make them better than what I ended up doing. If you have any other adjustments or suggestions please let me know!!


Also, if you know how to make a confetti cake, let me know!! I tried putting green non-pariels in the batter and they just disintegrated and that is how I ended up with green cupcakes. Totally appropriate for the holiday, but not the effect I was hoping for.

The order that you want to make things in is curd filling first, you can make this a day or two ahead if you want. Then cupcakes and then frosting.

Makes 24 cupcakes.

Key Lime Curd:

  • 10 Key Limes, juiced
  • 1 Regular Lime, zested
  • 1/3 Cup Sugar
  • 2 Egg Yolks
  • 3 Tbsp Butter, cubed
  • 1 tsp Cornstarch

Cupcakes:

  • 1 Box White Cake Mix
  • 1 Package White Chocolate
  • 1/2 Cup Milk
  • 1/2 Cup Vegetable Oil
  • 4 Eggs
  • 2 tsp Vanilla Extract
  • 1 Cup Sour Cream
  • Add some confetti wizardry or green food coloring if desired

Frosting:

  • 1 Cup Salted Butter, room temperature
  • 6 oz White Chocolate, melted
  • 4 Key Limes, Juiced
  • 1/4 tsp Salt
  • 2 Cups Powdered Sugar
  • Green food coloring and sprinkles if desired

To make the curd:

  • In a small dish stir together the sugar and lime zest. Let it macerate for about 5 minutes, this will help release some of those fragrant oils from the zest. In a small saucepan add the sugar, zest, butter, juice and yolks. Over medium heat cook for 12-15 minutes gently stirring constantly. The butter will melt and the  sauce will start to thicken. Stir in the cornstarch. Remove from heat and let cool for 5 minutes stirring occasionally. Push the curd through a mesh sieve.Transfer to a glass jar. Cover with plastic wrap so that it touches the top of the curd. Let it come to room temperature. Chill in the fridge while you make the cupcakes.

To make the cupcakes:

Preheat oven to 350.

In a stand mixer combine the cake mix and pudding mix. Add the milk and oil. Mix well. Add the eggs and vanilla, mix well, scrape down the sides of the bowl. Add the lime juice and sour cream, mix until just combined. Add in your sprinkles or food coloring. Use a cookie scoop to fill your cupcake liners 3/4 full. Bake for 20-22 minutes until a toothpick inserted into the cake comes out clean.

Once the cupcakes have fully cooled use a filling tip and pipe in the lime curd to the center of each cupcake. If you don’t have a filling tip you can cut out a hole in the middle of the cupcake and spoon in the curd.

To make frosting:

In a medium mixing bowl beat the butter with an electric hand mixer until smooth. Add 1/2 cup powdered sugar and the lime juice. Melt the chocolate 30 seconds at a time, stirring in between each segment. Once the chocolate is fully melted let it sit for a minute or two until it’s just warm to the touch. Slowly beat in the melted chocolate. Add the salt and the rest of the powdered sugar. Beat for 3-.5 minutes until your frosting is light and fluffy.

To add the green swirl add green food dye to the side creases in your piping bag. Use a spatula to fill the bag with frosting. I used a Wilton 1 M tip to pipe the rosettes.

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