Chocolate Mars & Mousse cake


January 16, 2016

  • Prep: 10 mins
  • Cook: 2 hrs
  • Yields: Serves 6


1 chocolate cake mix

2tbsp vegetable oil

8 mini Mars Bars

1 packet instant chocolate mousse


1prepare a 1.5lt slow cooker ( don't turn on til all ingredients are in sc)

2mix cake mix as per instructions.

3add oil to cake mix (unless cake mix already calls for oil, don't double up).

4spray sc insert with canola spray and add cake mix.

5chop mars bars into small pieces and sprinkle over cake mix.

6mix mousse as per instructions and dollop half the mix on top of the cake mix and mars pieces.

7cover sc with a tea towel and place lid on top.

8cook on high for 20 minutes then switch to low for 1 hr 40 mins or until cake is cooked through.

9when cooked, run a sharp knife around edges to loosen, place a plate on top of the insert and flip over.


1Serve hot with left over choc mousse and vanilla ice-cream.

2Be sure to rotate slow cooker if using a 1.5lt to avoid burning due to a hot spot. Rotate every half hour.

Submitted by Tara Astill.


10 Reviews

Hi Lynda 🙂 It says “Serve hot with left over choc mousse and vanilla ice-cream”


August 17, 2022

What do you do with other 1/2 of mousse mix?

Paulene @ Slow Cooker Central

November 15, 2021

Hi Heidi .. for round slow cookers some rotate the inner cooking bowl a couple times during cooking to avoid any hot spots in one place 🙂

Heidi Fletcher

November 14, 2021

Hi what do you mean rotate your slow cooker I haven’t heard of that before, never really cooked desserts in my sc. Thank you


November 18, 2019

Made this delightful recipe for hubby and the kids in my 1.5L slow cooker.
Turned out perfectly!


September 21, 2019

I want to make. Mars bar lava cake for dinner party tomorrow night but would like to do in individual ramekins but don’t have time tomorrow to experiment with cooking times. Do you have any idea how long it would approximately take. Thank you in advance

Christine warnock

September 21, 2019

Yes use a bigger cooker also l put large pieces of Mars bar so it doesnt melt altogether also l use all the choc mousse and have it with ice cream


September 26, 2018

Can this be cooked in advance during the day & heated up in the oven when needed?

Lorraine Barber

September 24, 2018

Made this today. It was a hit with myself and hubby. Did it in my 1.5 SC. Was fine. Didn’t overflow. Just a chocolaty tea towel lol 🤣. But i can live with that lol. Thanks for sharing this recipe 😉

Dianne Waite

July 10, 2018

A hit with the family. Will make again but will put in a bigger SC as it over flowed in the 1.5l

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