Key Lime Cupcakes
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Light and tangy key lime cupcakes with a zesty cream cheese frosting—perfect for a refreshing dessert or party treat.
- Author: Beth
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Total Time: 35 minutes (plus cooling and frosting time)
- Yield: 12 standard cupcakes 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
- 1 ½ cups all-purpose flour
- 1 cup granulated sugar
- 1 tsp baking powder
- ½ tsp baking soda
- ¼ tsp salt
- 2 large eggs
- ½ cup sour cream
- ¼ cup vegetable oil
- ¼ cup key lime juice (fresh or bottled)
- 2 tsp key lime zest
- 1 tsp vanilla extract
- ½ cup milk (whole or 2%)
- For frosting: 8 oz cream cheese, softened
- ⅓ cup unsalted butter, softened
- 2 cups powdered sugar, sifted
- 2–3 tbsp key lime juice
- Zest of 1 key lime for garnish
- Preheat your oven to 350°F (175°C). Line a 12‑cup muffin pan with paper liners.
- In a bowl, whisk flour, sugar, baking powder, baking soda, and salt until evenly combined.
- In another bowl, beat eggs, then whisk in sour cream, oil, key lime juice, zest, vanilla, and milk until smooth.
- Pour wet ingredients into dry ingredients; stir gently until just combined. Do not overmix.
- Divide batter evenly among the liners, filling about two‑thirds full.
- Bake for 18–20 minutes, or until a toothpick inserted into the center comes out clean.
- Let cupcakes cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
- For frosting, beat cream cheese and butter until creamy, about 2 minutes. Gradually add powdered sugar, then lime juice; beat until smooth and fluffy.
- Frost cooled cupcakes using a piping bag or knife; garnish each with key lime zest.
Notes
- Use bottled key lime juice if fresh limes aren’t available—just ensure it’s pure key lime juice.
- For extra tang, add ½ tsp pure vanilla extract to the frosting.
- To make mini cupcakes, reduce bake time to 12–14 minutes.
- Store cupcakes in the fridge and allow them to come to room temperature before serving.
- Substitute low‑fat sour cream and butter for lighter versions.
Nutrition
- Serving Size: 1 cupcake with frosting
- Calories: 320 kcal
- Sugar: 28 g
- Sodium: 160 mg
- Fat: 18 g
- Saturated Fat: 10 g
- Unsaturated Fat: 6 g
- Trans Fat: 0.2 g
- Carbohydrates: 35 g
- Fiber: 0.5 g
- Protein: 4 g
- Cholesterol: 55 mg