Halloween Slime Cupcakes
If you’re looking for a fun and spooky treat to celebrate Halloween, these Halloween Slime Cupcakes are just the thing! They’re not only adorable but also delicious, with a delightful combination of fluffy vanilla cake and zesty lime filling. This recipe is perfect for family gatherings, school parties, or even just a cozy night in with your favorite scary movie. Trust me, your loved ones will have a blast devouring these gooey green delights!
What makes these cupcakes so special is how easy they are to make while still feeling festive. Plus, the bright colors and candy eyes will surely bring smiles to faces of all ages!
Why You’ll Love This Recipe
- Easy to prepare: With simple steps and straightforward ingredients, you can whip these up without stress.
- Family-friendly: Kids will love helping decorate these spooky treats; it’s a fun way to get everyone involved!
- Make-ahead convenience: Bake them in advance and store them; they’ll taste just as sweet when it’s time for the celebration.
- Delicious flavor: The combination of vanilla, lime, and colorful buttercream creates a truly irresistible cupcake that everyone will enjoy.

Ingredients You’ll Need
Let’s gather some simple, wholesome ingredients to create our Halloween Slime Cupcakes! You probably have most of them in your kitchen already.
For the Cupcakes
- 175 g Baking spread (or butter) (softened, unsalted)
- 175 g Caster sugar
- 3 Eggs (large)
- 2 tsp Vanilla extract
- 175 g Self-raising flour
- 25 g Black food coloring
For the Buttercream Frosting
- 200 g Butter (softened, unsalted)
- 400 g Icing sugar
- 1 tsp Vanilla extract
- 1-2 tbsp Milk
- Green food coloring
- Yellow food coloring
For the Filling and Decoration
- 150 g Tinned custard
- Candy eyes
- Green sprinkles
Variations
This recipe is super flexible! Here are some fun variations you might try:
- Change the filling: Swap out lime marmalade for other fruity options like raspberry or orange jelly for a different flavor twist.
- Mix up the colors: Use purple or orange food coloring instead of green for a different spooky theme!
- Add some crunch: Toss in crushed cookies or candy pieces into the buttercream for added texture.
- Try different toppings: Instead of candy eyes, use gummy worms or edible glitter to give your cupcakes an extra special touch.
How to Make Halloween Slime Cupcakes
Step 1: Preheat Your Oven
Preheat your oven to 140C Fan/325F/Gas Mark 3. While it warms up, line a cupcake tin with cupcake cases—black ones will add an extra spooky touch!
Step 2: Make the Cupcake Batter
In a large bowl, mix together the baking spread and caster sugar using an electric mixer for about 5 minutes until it’s light and fluffy. This step creates air bubbles that make your cupcakes rise beautifully.
Step 3: Add Wet Ingredients
Next, whisk in the eggs and vanilla extract until well combined. This adds moisture and flavor to our base.
Step 4: Incorporate Dry Ingredients
Gently fold in the self-raising flour. Folding helps maintain that airy texture we want in our cupcakes.
Step 5: Add Color
Stir in the black food coloring until evenly mixed. It may look intense now, but trust me—this dark hue is what gives our cupcakes their spooky vibe!
Step 6: Bake!
Divide the batter evenly among your cupcake cases. Bake them for about 25-30 minutes or until a skewer comes out clean when inserted into the center. Once baked, let them cool completely on a wire rack.
Step 7: Create Space for Filling
Once cooled, use a cupcake corer or knife to make holes in the middle of each cupcake. This is where we’ll add our delightful green slime!
Step 8: Fill with Custard
Mix a little green food coloring into the tinned custard until you achieve your desired slimy shade. Spoon this gooey goodness into each hole you made earlier.
Step 9: Make Buttercream Frosting
In another bowl, beat together the softened butter and icing sugar until smooth. Add in vanilla extract along with milk and both green and yellow food colorings to achieve that bright green hue we want for our frosting.
Step 10: Decorate Your Cupcakes
Using a piping bag (or just a spoon if you prefer), generously pipe or spread the vibrant buttercream on top of each cupcake. Don’t forget to sprinkle on those candy eyes and green sprinkles—these little details make all the difference!
Step 11: Store & Enjoy!
Keep your cupcakes in an airtight container at room temperature. They’re best enjoyed within three days—if they last that long!
Now that you have this delightful Halloween Slime Cupcakes recipe under your belt, I can’t wait for you to share them with friends and family! Happy baking!
Pro Tips for Making Halloween Slime Cupcakes
Making these spooky treats can be a delightful experience, and a few clever tips can make it even better!
- Use room temperature ingredients: Ensuring your baking spread and eggs are at room temperature helps them mix more easily, resulting in a fluffier cupcake.
- Don’t overmix the batter: Gently folding in the flour ensures your cupcakes remain light and fluffy. Overmixing can lead to dense cupcakes that lose their airy texture.
- Check doneness with a skewer: Instead of relying solely on baking time, use a skewer to check if your cupcakes are baked through. If it comes out clean, they’re ready; if not, give them a few more minutes.
- Cool completely before filling: This step is crucial! Filling warm cupcakes can cause the filling to melt or leak out. Let them cool on a wire rack for the best results.
- Experiment with colors: Feel free to adjust the green and yellow food coloring in your buttercream to achieve your desired shade. A vibrant color will enhance the Halloween theme!
How to Serve Halloween Slime Cupcakes
These Halloween Slime Cupcakes are not just delicious but also visually stunning! Presenting them creatively can elevate your festive table.
Garnishes
- Candy Corn: Add some candy corn around the base of each cupcake for an extra pop of color and sweetness.
- Edible Glitter: Sprinkle some edible glitter on top of the buttercream for a magical touch that sparkles under the light.
- Chocolate Sprinkles: Use dark chocolate sprinkles as an additional topping to create a creepy yet delightful contrast against the bright green frosting.
Side Dishes
- Witch’s Brew Punch: A refreshing green punch made with lime soda and pineapple juice makes for a fun pairing with your cupcakes. Add floating fruit slices for an enchanting look!
- Ghost-shaped Sandwiches: Use cookie cutters to create ghost-shaped sandwiches filled with cream cheese or hummus. They’re easy to make and add some savory balance to your sweet treats.
- Veggie Platter with Dip: Fresh vegetables like cucumbers, carrots, and bell peppers served with a colorful dip offer a healthy crunch that complements the sweetness of the cupcakes beautifully.
- Mummy Dogs: Wrap mini hot dogs in crescent roll dough to resemble mummies, perfect for kids and adults alike at any Halloween gathering.
With these serving suggestions, your Halloween Slime Cupcakes will be the star of any spooky celebration!

Make Ahead and Storage
These Halloween Slime Cupcakes are perfect for meal prep, allowing you to get a head start on your festive baking. You can whip them up in advance and enjoy them fresh later on!
Storing Leftovers
- Store the cupcakes in an airtight container at room temperature for up to 3 days.
- If you need to keep them longer, consider refrigerating them, but be aware that this might affect the texture.
Freezing
- To freeze, place the cooled cupcakes in a single layer on a baking sheet and freeze until solid.
- Once frozen, transfer them to an airtight container or freezer bag. They can be stored for up to 2 months.
- When ready to enjoy, thaw them at room temperature before decorating.
Reheating
- If you’d like to enjoy warm cupcakes, preheat your oven to 150C/300F.
- Place the cupcakes on a baking tray and heat for about 5-10 minutes until warmed through.
FAQs
Here are some common questions you might have about making these delightful Halloween Slime Cupcakes!
Can I use different food coloring for Halloween Slime Cupcakes?
Absolutely! While black and green create a spooky effect, feel free to experiment with other colors that suit your Halloween theme.
How can I make Halloween Slime Cupcakes dairy-free?
You can replace the butter with a dairy-free spread and use plant-based milk alternatives in your buttercream. Your cupcakes will still be delicious!
How long do Halloween Slime Cupcakes stay fresh?
These cupcakes are best eaten within 3 days when stored properly in an airtight container.
What’s the best way to decorate my Halloween Slime Cupcakes?
Using candy eyes and green sprinkles adds a fun touch! Get creative with other Halloween-themed decorations like gummy worms or edible glitter.
Final Thoughts
I hope you find joy in creating these whimsical Halloween Slime Cupcakes! They’re not just adorable but also packed with flavor that everyone will love. Whether you’re making them for a spooky gathering or just for fun, I encourage you to dive into this recipe. Enjoy every delightful bite!
Halloween Slime Cupcakes
Get ready to impress your friends and family with these whimsical Halloween Slime Cupcakes! Perfect for any spooky gathering, these delightful treats feature fluffy vanilla cake filled with a zesty lime filling and topped with vibrant green buttercream. Not only are they visually striking with their ghoulish colors and candy eyes, but they also pack a delicious punch that everyone will love. Easy to prepare and fun to decorate, these cupcakes will become a festive favorite for kids and adults alike. Whether you’re hosting a Halloween party or just enjoying a cozy movie night, these colorful goodies are sure to bring smiles all around!
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
- 175 g Baking spread (or unsalted butter)
- 175 g Caster sugar
- 3 Eggs (large)
- 2 tsp Vanilla extract
- 175 g Self-raising flour
- 25 g Black food coloring
- 200 g Butter (softened, unsalted)
- 400 g Icing sugar
- 1 tsp Vanilla extract
- 1–2 tbsp Milk
- Green food coloring
- Yellow food coloring
- 150 g Tinned custard
- Candy eyes
- Green sprinkles
Instructions
- Preheat your oven to 140C Fan/325F/Gas Mark 3 and line a cupcake tin with cases.
- In a large bowl, beat the baking spread and caster sugar until light and fluffy.
- Whisk in eggs and vanilla until combined.
- Gently fold in the self-raising flour, then stir in black food coloring.
- Divide batter among cases and bake for 25–30 minutes until cooked through. Cool completely on a wire rack.
- Create holes in the cooled cupcakes; fill with green-tinted custard.
- Prepare the buttercream by mixing softened butter, icing sugar, milk, green, and yellow food coloring until smooth.
- Decorate cupcakes with the vibrant buttercream, candy eyes, and sprinkles.
Nutrition
- Serving Size: 1 serving
- Calories: 230
- Sugar: 22g
- Sodium: 150mg
- Fat: 9g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 0.5g
- Protein: 2g
- Cholesterol: 50mg