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Key Lime Cupcakes with creamy lime frosting and lime zest garnish on a white plate

Key Lime Cupcakes Filled with Creamy Lime Frosting


  • Author: Maria
  • Total Time: 40 minutes
  • Yield: 12 cupcakes

Description

These Key Lime Cupcakes Filled with Creamy Lime Frosting are the perfect fusion of sweet and tangy, made with wholesome ingredients like almond flour, Greek yogurt, and coconut sugar. Each bite delivers a burst of zesty key lime flavor, balanced by a rich, creamy center made from light cream cheese and monk fruit sweetener. Whether you’re looking for a healthier dessert option, a gluten-free treat, or just something refreshing and unique, these cupcakes are easy to make, totally customizable, and sure to impress. Ideal for summer gatherings, meal prep, or guilt-free snacking!


Ingredients

🧁 Cupcake Batter Ingredients:

  • 1 cup whole wheat pastry flour

  • ½ cup almond flour

  • 1 tsp baking powder

  • ½ tsp baking soda

  • ¼ tsp sea salt

  • 2 large eggs

  • ½ cup coconut sugar

  • ¼ cup avocado oil

  • ½ cup plain Greek yogurt

  • 2 tbsp fresh key lime juice

  • Zest of 2 key limes

  • 1 tsp vanilla extract


🍋 Creamy Lime Frosting Filling:

  • 6 oz light cream cheese (softened)

  • ¼ cup powdered monk fruit sweetener

  • 1 tbsp fresh key lime juice

  • Zest of 1 key lime


Instructions

🧁 How to Make Key Lime Cupcakes Filled with Creamy Lime Frosting

Step 1 – Preheat & Prep

  • Preheat your oven to 350°F (175°C).

  • Line a 12-cup muffin tin with paper liners.

  • Lightly spray liners with non-stick spray if using alternative flours to avoid sticking.


Step 2 – Mix Dry Ingredients

In a medium bowl, whisk together:

  • 1 cup whole wheat pastry flour

  • ½ cup almond flour

  • 1 tsp baking powder

  • ½ tsp baking soda

  • ¼ tsp sea salt

📝 Tip: Almond flour tends to clump—break it up with your fingers or a fork if needed.

Step 3 – Mix Wet Ingredients

In a large mixing bowl, whisk or beat until smooth:

  • 2 eggs

  • ½ cup coconut sugar

  • ¼ cup avocado oil

  • ½ cup plain Greek yogurt

  • 2 tbsp fresh key lime juice

  • Zest of 2 key limes

  • 1 tsp vanilla extract

📝 Mix until silky and uniform—don’t overmix.

Step 4 – Combine Wet & Dry

  • Gradually fold the dry mixture into the wet ingredients using a spatula.

  • Stir just until combined—avoid overmixing to keep the cupcakes light and fluffy.

Step 5 – Fill & Bake

  • Spoon batter into cupcake liners, filling each about ¾ full.

  • Bake for 18–22 minutes, or until tops are lightly golden and a toothpick comes out clean.

  • Let cupcakes cool completely on a wire rack before filling.

🍋 Make the Creamy Lime Frosting Filling

Filling Ingredients:

  • 6 oz light cream cheese (softened)

  • ¼ cup powdered monk fruit sweetener

  • 1 tbsp fresh key lime juice

  • Zest of 1 key lime

Instructions:

  • Beat all ingredients together in a bowl until smooth and fluffy.

  • Chill in the refrigerator for at least 20 minutes to firm up for piping.

🍥 Fill the Cupcakes

  • Once cupcakes are cool, use a cupcake corer or small knife to core out the center of each cupcake.

  • Pipe or spoon 1–2 teaspoons of the chilled filling into each cupcake.

  • Optional: Replace the top core piece or simply cover with frosting.

Optional Frosting Decoration

  • Use remaining filling as frosting: pipe a swirl on top using a piping bag with a star tip.

  • Garnish with:

    • A thin slice of lime

    • A sprinkle of lime zest

    • Toasted coconut or edible flowers (optional)

  • Prep Time: 20 minutes
  • Cook Time: 20 minutes
  • Category: Healthy Dessert, Cupcakes
  • Method: Baking
  • Cuisine: American, Fusion

Nutrition

  • Serving Size: 1 cupcake
  • Calories: 160–180 kcal (approximate, varies with substitutions)

Keywords: key lime cupcakes, healthy cupcakes, gluten-free cupcakes, low sugar dessert, lime frosting, protein cupcakes, summer dessert