Description
Delightfully spooky and delicious, these Slimer Ghostbusters Cupcakes feature fluffy lime-flavored cupcakes filled with a tart lime curd slime and topped with electric green frosting and fondant decorations resembling the iconic ghost. Perfect for Halloween parties or any Ghostbusters fan celebration, these cupcakes combine bright citrus flavors with playful, colorful presentation.
Ingredients
Scale
Cupcakes
- 6 Tbsp (3/4 stick) unsalted butter, room temperature (85g)
- 3/4 cup granulated sugar (150g)
- 1/3 cup carton egg whites or 3 large egg whites, room temperature (90g)
- 1/3 cup full-fat sour cream, room temperature (80g)
- 1/3 cup whole milk, room temperature (80g)
- 1/4 cup lime juice (60g)
- 1 tsp vanilla extract or vanilla bean paste (4g)
- 2 tsp lime zest (4g)
- Green gel food coloring, as needed
- 1 1/4 cups all-purpose flour (165g)
- 2 tsp baking powder (8g)
- 1/4 tsp fine salt (2g)
- 3 large eggs, room temperature (168g)
- 3/4 cup granulated sugar (150g)
- 1/4 tsp fine salt (2g)
- 1/2 cup fresh lime juice (120g)
- 1 Tbsp lime zest (6g)
- 6 Tbsp (3/4 stick) unsalted butter, room temperature (85g)
- Electric green gel food coloring, as needed
Frosting
- 1 cup unsalted butter, room temperature (226g)
- 2 Tbsp lime juice (12g)
- 1 tsp lime zest (2g)
- 1 tsp vanilla extract or vanilla bean paste (4g)
- 1/2 tsp fine salt (3g)
- 3 1/2 cups powdered sugar (452g or 1 lb. box)
- Electric green gel food coloring, as needed
Decorations
- 1/4 cup red fondant
- 1/4 cup black fondant
- 1 Tbsp yellow fondant
- 1 Tbsp white fondant
Instructions
- Prepare the Cupcake Batter: In a large mixing bowl, cream 6 Tbsp unsalted butter with 3/4 cup granulated sugar until light and fluffy. Add 1/3 cup egg whites, 1/3 cup sour cream, 1/3 cup whole milk, 1/4 cup lime juice, 1 tsp vanilla extract, 2 tsp lime zest, and green gel food coloring. Mix until well combined. In a separate bowl, sift together 1 1/4 cups all-purpose flour, 2 tsp baking powder, and 1/4 tsp fine salt. Gradually add the dry ingredients to the wet ingredients, mixing gently until just combined.
- Whip Egg Mixture: In another bowl, beat 3 large eggs, 3/4 cup granulated sugar, and 1/4 tsp salt until thick and lightened in color. Gently fold this mixture into the cupcake batter, ensuring an even consistency. Add 1/2 cup fresh lime juice, 1 Tbsp lime zest, 6 Tbsp unsalted butter, and electric green gel food coloring to enhance the vibrant color and flavor.
- Bake the Cupcakes: Preheat the oven to 350°F (175°C). Line a 12-cup muffin tin with cupcake liners and evenly distribute the batter among the cups. Bake for approximately 15 minutes or until a toothpick inserted into the center comes out clean. Remove from oven and cool completely on a wire rack.
- Prepare the Frosting: In a large bowl, beat 1 cup unsalted butter until creamy. Gradually add 3 1/2 cups powdered sugar, 2 Tbsp lime juice, 1 tsp lime zest, 1 tsp vanilla extract, and 1/2 tsp salt. Beat the mixture on medium-high speed until light and fluffy. Add electric green gel food coloring until the desired vibrant green color is achieved.
- Assemble the Cupcakes: Once the cupcakes are cooled, use a small knife or cupcake corer to hollow out the center of each cupcake and fill with lime curd or lime-flavored filling if desired for the slime effect. Pipe the green frosting on top of each cupcake creating a smooth or swirled appearance to mimic Slimer’s gloppy slime. Use the red, black, yellow, and white fondant pieces to craft Slimer’s eyes and mouth details, attaching them gently to the frosting.
- Serve and Enjoy: Allow the cupcakes to set slightly so the frosting firms up. Serve at room temperature. These cupcakes make a perfect festive treat with their tangy lime flavor balanced by rich buttery frosting and eye-catching Slimer decorations.
Notes
- These Ghostbusters-inspired Slimer cupcakes are made with fluffy lime cupcakes and tangy lime curd slime filling, making them fun and festive for Halloween or any fan event.
- Make sure all your wet ingredients are at room temperature for best mixing results.
- You can prepare the frosting the day before and keep it refrigerated; bring it to room temperature before frosting the cupcakes.
- Use gel food coloring for the most vibrant green without altering frosting consistency.
- Fondant decorations can be made in advance and stored in an airtight container.
Nutrition
- Serving Size: 1 cupcake
- Calories: 556 kcal
- Sugar: 58 g
- Sodium: 417 mg
- Fat: 30 g
- Saturated Fat: 18 g
- Unsaturated Fat: 10 g
- Trans Fat: 1 g
- Carbohydrates: 70 g
- Fiber: 1 g
- Protein: 5 g
- Cholesterol: 122 mg
