I absolutely love Halloween and all the spooky themed food that comes with it. These Slime Cupcakes fit the bill perfectly as they look rather scary with their black “burnt” sponge, bright green “toxic” buttercream and creepy candy eyes, but don’t be fooled – they taste absolutely yummy! Once you bite into their menacing exterior you’ll find gooey “radioactive” slime inside! I used a lime marmalade to create this effect, but you could use strawberry jam for a “blood and guts” theme inside too. Kids and adults alike will love making these fun slime cupcakes to disgust and delight their family and friends over the Halloween season!
Step by step…
To make the cupcakes sponges I creamed together the butter and caster sugar, then added the black food colouring. I whisked in the eggs, vanilla extract and then the self raising flour.
I divided the batter into the black cupcake cases. They baked for 20 mins, I had to use a cake skewer to check they were done as they were so black!
When they fully cooled, I used a cupcake corer to make holes in the middle of each cake.
I added a little bit of lime green food colouring to the lemon and lime marmalade, then spooned it into each cupcakes.
To make the buttercream I mixed together the butter and icing sugar. I added the vanilla extract and the lime green food colouring until I had a nice bright green colour. I piped it onto the cupcakes then added the candy eyes!
Despite the spooky appearance of the slime cupcakes, they were extremely popular. Everyone was attracted to their bright and unusual colours. My friends and family were pleasantly surprised by the light vanilla flavour of the sponge and buttercream, and they loved the citrus zing of the lime marmalade filling.
Recommended equipment & ingredients*
| Cupcake tin | Electric hand mixer | Piping bags |
| Cupcake corer | Black cupcake cases | Lime green food colouring |
| Jem 1E Piping nozzle | Wilton 1M Piping nozzle | Candy eyes |
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More Halloween Cupcake recipes…
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| Bleeding Brain Cupcakes | Halloween Vampire Bat Cupcakes | Halloween Graveyard Cupcakes |
Slime Cupcakes
Black coloured cupcakes filled with lime marmalade, topped with bright green coloured buttercream and candy eyes
Ingredients
For the cupcake sponge
- 175 g Baking spread
- 175 g Caster sugar
- 25 g Black food colouring
- 3 Eggs large
- 175 g Self raising flour
- 2 tsp Vanilla extract
For the buttercream
- 200 g Butter
- 400 g Icing Sugar
- 1 tsp Vanilla
- Lime green food colouring
For the filling and decoration
- Lemon & lime marmalade
- A few drops of Lime green food colouring
- Candy eyes
Instructions
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Pre-heat your oven to 160C Fan/180C/350F/Gas Mark 4, line a large cupcake or muffin tray with black cupcake cases
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Cream together the butter and caster sugar, then add the black food colouring, you will need quite a lot
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Whisk in the eggs and vanilla extract, then add the self raising flour and whisk in
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Divide the batter between the black cupcake cases
-
Bake for 20 mins, you will have to use a cake skewer to check they are done because of the colour!
-
Let the cupcakes fully cool, then use a cupcake corer or a knife to make holes in the middle of each cake
-
Add a little bit of lime green food colouring to the lemon and lime marmalade, then spoon it into each cupcake
-
Make the buttercream by mixing together the butter and icing sugar until smooth, then add the vanilla extract and the lime green food colouring until you have a bright green colour
-
Using a piping bag, pipe the buttercream onto the cupcakes. Then add the candy eyes!
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Store in an airtight container in a cool place, eat leftovers within 3 days
If you like this, check out more of my Cupcake recipes!
Or you might like my Halloween recipes!
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What a fantastic idea for Halloween! Especially like the slime filling which I think is really creative x
Thanks so much Cat!
What a brilliant idea love this…in fact, that’s one day in half term sorted…kiddies are making slime cupcakes (with a wee tweak to make them free from) #CookBlogShare
Thanks Rebecca! I do hope you and your family enjoy them!
These look delicious Kat. I love the idea of using marmalade to make green slime, the extra food colouring really gives it an amazing colour.
Thanks Charlotte! I did have to use a lot of black food colouring, but the effect is worth it for a one off treat!
These are brilliant! I particularly love that they’re filled with green slime as well as having a toxic green top. Fantastic!
Of course, now I have a hankering for Rose’s Lime marmalade, which I’ve not even seen for years, much less had any! 😉
#CookBlogShare
I used Rose’s Lime marmalade, I found it in Tesco!
Wow these are so striking Kat! My kids will adore these, we’ll have to give them a go over half term. Love the green slime effect, so cool.
Thanks Lucy, let me know how they get on I’d love to see!
These are fantastic! I’m not keen on orange marmalade but I love lime marmalade and would definitely like to try these. They sound so tasty as well as looking great.
Me too Corina, I’m not a fan of standard orange marmalade but I really enjoyed the lime one!
I love these – so cute and yet very easy to achieve. Lime marmalade for the slime is brilliant!very clever x
#Bakeoftheweek
Thank Jenny!
These look fab! You’ve got a great colour on the sponge & the icing!
Thanks Helen! I’m really liking the ProGel food colours at the moment!
Oh wow Kat these look fantastic! The kids would definitely love these! I love the vibrant colour of the icing. Thank you for sharing with #CookBlogShare x
Thanks Kirsty! People did seem to be very attracted to the bright colours!
How much fun are these I love them!
Thanks so much Jacqui!
These are brilliant. What a great idea 🙂
Thanks Claire!
This is a recipe that makes me smile! It must be the cutest Halloween treats I have seen! Happy Fiesta Friday 🙂
Wow Petra, that is high praise – thank you!
What are a great idea Kat. My daughter is obsessed with slime so these would be a huge hit with her. Thanks for sharing the recipe.
Thanks Nate! I hope she likes them!
These are absolutely brilliant Kat! Loving the toxic buttercream, and as for the radiocative slime! Genius 🙂 Thankyou for joining in with #BakingCrumbs too 🙂
Angela xx
Thanks so much Angela and thank you for hosting!
So cute! What a great icing colour too….. Perfect for Halloween x
Thanks Kate, I used ProGel colour in Lime Green.
these look so cute – I made bikkies last halloween using black tahini and it really made them so dark – I would love to try these cupcakes with black tahini but I don’t think I could pipe the toxic icing as prettily as you