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How to make a Slime-Filled Bubbling Cauldron Cake for Halloween | Cupcake Jemma

It’s Halloween time!! Finally!! It’s so annoying that it only happens once a year. Well, anyway, if you’re looking for something spooktacular to whip up for the occasion this year then look no further! This bubbling cauldron cake is going to blow your minds!

You will need to make 4 layers (5″) of your favourite cake. Mine is…
250g plain flour
275g caster sugar
45g cocoa powder
3/4 tsp bicarbonate of soda
1/4 tsp salt
160ml coffee
160ml buttermilk
160ml vegetable oil
2 large eggs

Quantity of your favourite buttercream
Black sugarpaste
Green jelly/jello


MY INSTAGRAM: @cupcakejemma
CAKESTAGRAM: @crumbsanddoilies



Crumbs & Doilies
1 Kingly Court



  1. Adom Uddin says:

    am I the only one who watches her after made for you advert

  2. Ayesha Shafqat says:

    please make a behind the scenes video of c&d and show cakes made there

  3. Joanne McNulty says:

    Instead of coffee, can you maybe use coco powder? I'm planning to make this for my little cousins who hate coffee. Help please😁

  4. Sofia MP says:

    Reminds me of Harry Potter!πŸ˜‚ (the cake of course)

  5. Loredana Rusu says:

    I love this…

  6. Eveline Pullins says:

    You could make a πŸŽπŸŠπŸ‹πŸ‘ with that shape. Ow you just said that πŸ˜‚πŸ˜‚

  7. SugarQueennn says:

    7:11 now the cake looks like a coconut with the straw out of it!

  8. SugarQueennn says:

    leaky cauldron!

  9. Soniya Brown says:

    how to make fondant?

  10. Psychotic Hatter says:

    Where do you get the buttermilk?

  11. Amy C. says:

    Jemma's so cool.

  12. Death Bliss says:

    I really love how you eerily designed your kitchen for us.

  13. Andreana Bui says:

    Can someone please convert into US measurements for the dry ingredients please

  14. daria says:

    Loooved the creepy laugh at the end! πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚πŸ˜‚

  15. Girija Khandge says:

    Please tell me the replacement of egg..

  16. I p says:

    Looks cool

  17. lynnhongmusic says:

    I think it could be really bubbly if instead of injecting more liquid, you just pumped in air. Kinda like how you can make bubbles in your drink with a straw.

  18. Angelos Agapiou says:

    Had to login from work just to say this : FREAKIN AMAZING T-SHIRT….

  19. Natalie Larcombe says:

    Hi what would you use in place of the coffee as we're not coffee lovers

  20. Morgan Norris says:

    the video wasn't very great

  21. Samuel Roberts says:

    This is such a cool cake, Jemma! You did a great job! I'm excited for Halloween myself! I've already got my decorations and now I'm going to make some delicious goodies! Please reply if you get a chance!

  22. Andrea Franco says:


  23. t4md says:

    Brilliant!! How do you come up with these great ideas?

  24. lisa dalby says:

    hi there gemma. we loving ur cakes videos. do u have a dairy free recipe at all plz

  25. Rai Mukherjee says:

    Jemma your ideas are incredible

  26. Vishakha Ganu says:

    Oh my God…. Woww…. You took me to a Hogwarts Halloween…. Bubble Bubble… Toil and Trouble…. Something wicked his way comes!

  27. Sergei Simonenko says:

    The T-shirt is epic!!! And I am a great fan of MK. Where can I purchase it? Would love to have one featuring Kitana. I live in Dubai though…

  28. BeeBee says:

    I love all your Halloween videos. It’s fun πŸ‘»πŸ˜„β€οΈπŸ‘πŸ½

  29. Mandy Green says:

    Is sugar paste and fondant similar at all? Also what is castor sugar? I have never heard of it. I Googled it and had no results show up. Plz someone explain those two that I asked about? Thank you! 😊

  30. Debra Tatum says:

    If I was to bake (Gluten free), would i be able to use almond flour instead of regular flour for any of your cake recipes ?

  31. Rodney Lane says:

    Could you please show us how you make cake pops with all the left over bits of cake from your recipes? You have mentioned them several times and you always have off-cuts – we'd love to see them made into something . Thanks πŸ™‚

  32. Abby Cockrell says:

    Be careful with the latex some people have allergic reactions to the latex in the gloves that have touched their food

  33. Gina Gutierrez says:

    Hi! Love your channel! Why did you use gum paste and not fondant?

  34. Jenifer Alvarez says:

    I love this!!!

  35. jyotitoma says:

    I am so disappointed. Your recipe never works. You can’t you guys be true in video.

  36. B l u e B e r r y's says:


  37. Ellen Hofer says:

    Great cake!

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