Chocolate Slab Cake

I bake healthy snacks for my kids through the week, but occasionally I do like to treat them to something ooey, gooey and utterly yummy as a Friday after school treat.

I found this Chocolate Cake with Cream Cheese Icing in the thermomix recipe community. I’ve never tried Chocolate Cream Cheese icing before and must say, this was so good I will definitely be making it again.

Here is a very similar regular version for you from Good Chef, Bad Chef.

{The Organsied Housewife} Chocolate Cake with Chocolate Cream Cheese Icing

I found the recipe on the community page hard to understand, I read their instructions to add all ingredients, not reading further enough for EXCEPT boiling water, so I have re-typed it out here, plus I also don’t cook it for as long as it recommended.  recipe credit to pkwilly.


Chocolate Slab Cake

  • Author: Katrina Springer
  • Prep Time: 10 mins
  • Cook Time: 30 mins
  • Total Time: 40 mins


  • 100 g Butter
  • 250 g milk
  • 2 eggs
  • 2 tsp vanilla extract
  • 460 g sugar
  • 290 g plain flour
  • 65 g cocoa
  • 1 1/2 teaspoons bi-carb
  • 1 1/2 teaspoons baking powder
  • 230 g boiling water


  • 200 g icing sugar
  • 75 g Butter, at room temp
  • 30 g cocoa
  • 150 g cream cheese, cubed
  • 1 tsp Vanilla Paste


  1. Preheat oven to 180°C.
  2. Grease up 2 x 20cm cake pans or one large lamington pan.
  3. Melt butter for 2 min / 60°C / speed 2, or until completely melted.
  4. Add milk, eggs & vanilla extract, mix 3 seconds / speed 3.
  5. Add sugar, flour, cocoa, bi-carb and baking powder, mix 20 seconds / speed 4.
  6. Add boiling water, mix 10 seconds / speed 4.
  7. Scrape sides & bottom of bowl, mix 10 seconds / speed 4.
  8. Pour into pans and cook 25 minutes if using 2 pans, 35-40 minutes if using one large pan, or until a skewer comes out clean.
  9. Leave cake in pan for 5 minutes, then carefully turn out and allow to cool completely before icing.


  1. Add icing sugar, butter, cocoa and vanilla to a clean TM bowl, mix 5 seconds / speed 6, or until mixture comes together.
  2. Add cream cheese, mix speed 7 / 10 – 15 seconds, or until combined and motor takes off!
  3. Put in butterfly, mix 2 minutes / speed 4.
  4. Ice cakes as required!

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Amanda August 14, 2014 - 1:10 PM

How come we cant access recipes???

Very disappointing and time wasting!

Katrina August 14, 2014 - 1:18 PM

Amanda the links are above. It’s not my recipe to be able to type it up and reshare it, but click on the links in the pink in the first paragraph and you will find the full recipes there.

Gillian June 9, 2015 - 12:23 PM Reply
Katrina - The Organised Housewife June 9, 2015 - 12:44 PM

Thank you Gillian, updating now 🙂

Katrina August 14, 2014 - 1:19 PM

Also, click on the images for each of the other recipes and it will take you directly to the recipe page for those items.

Gerdie March 26, 2016 - 12:31 AM

Hi Kat, how many servings can I yield from the chocolate slab cake? Many thanks for a great site!

Hannah August 15, 2014 - 6:47 AM

Thank you for sharing! I love your website and I don’t even have kids, but I am learning some awesome tips and tricks and so much creativity along the way 🙂 keep it up!

Katrina August 16, 2014 - 11:34 PM

Thank you Hannah, I am so pleased you are enjoying the website, this cake is so yummy, no kids means more for you!!

Lynz January 4, 2018 - 12:27 AM

Hi Katrina, is the icing very runny?

Katrina - The Organised Housewife January 8, 2018 - 2:32 PM

Hi Lynz, Not too runny that it runs off the cake

Rebecca Bone January 27, 2018 - 8:49 PM

Can you freeze the cake with the icing on?

Katrina - The Organised Housewife January 29, 2018 - 10:26 AM

Yes you could. It would be yummy re-heated slightly in the microwave too

Tracey August 9, 2019 - 2:34 PM

Great recipe… Love the way it makes such a large cake, so versatile.

Katrina - The Organised Housewife August 13, 2019 - 2:56 PM

It’s great isn’t it Tracey?! Thank you for your lovely feedback. Kat x

corrina August 26, 2021 - 12:45 PM

Hi there, I was wondering if it was possible to leave out the cocoa and if i needed to add anything extra to make it a plain vanilla cake. Thank you


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