Mars Bar Chocolate Brownie
Member recipe

Mars Bar Chocolate Brownie

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(12 ratings)

Member recipe by


Serves 1 - 16 Pieces

A lovely Brownie with a orginal twist. Nice for a BBQ evening. Great for kids to help !

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  • 100g margarine
  • 40g cocoa
  • 2 eggs
  • 200g caster sugar
  • 2.5ml vanilla essence
  • 50g self- raising flour
  • 1-2 medium sized mars bar bags (85-100g)


    1. Preheat the oven to 180 degrees/ gas mark 4 and set shelf towards middle of the oven.
    2. Line an 20cm (8") square tin or 25cm x 6cm (10"x 6") rectangular tin with baking parchment or greaseproof paper.
    3. Chop up the Mars bars into cubes of approx. 0.5cm (1/4").
    4. Melt margarine slowly in small pan or microwave then remove from heat and stir in cocoa and beat until smooth. Leave on one side to cool. Weigh out the flour.
    5. Whisk the eggs and sugar in a medium mixing bowl until light and fluffy.
    6. Add the cooled cocoa mixture and mix well. Stir in the vanilla essence.
    7. Sift the flour over the top of the chocolate mixture and fold in using a metal spoon and a figure of 8 movement. Fold in the chopped Mars
    8. Pour into prepared tin and level.
    9. Bake in the oven for 30 mins until the cake has a dull crust on the top and the sides are coming awy from the edge of the tin. Leave in the tin to cool as it is very soft. Cut into approx. 16 squares
    10. Freezes well. Nice warmed slighly and served with whipped cream and choclate sauce. YUM!

Comments, questions and tips

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12th Oct, 2018
I use this recipient often and I find they are better if you swap to soft brown sugar and add a small amount of coffee(for the coco makes it taste more chocolatey) and I always add about 120g of mars. But equally I’ve swapped out the mars for 120g of whatever I’ve had to hand and they always work well.
CSuzanne2's picture
25th Mar, 2017
I have made these brownies several times now in my 8"square tin and they are great! My only issue is the brownies are quite thin, is this how they are suppose to be or am i doing something wrong?
trinaz's picture
18th Jun, 2019
They usually are an average thickness. I suppose if you like them thick use a smaller tin.
CSuzanne2's picture
25th Mar, 2017
Lovely recipe, I've made this several times now in my 8" square tin the only issue I have is the brownies are not very deep they are quite thin, am I doing something wrong or are the suppose to be like that?
trinaz's picture
11th Jan, 2017
25th Apr, 2016
Amazing recipe, my 4yr old was so proud to help me. I have use bounty's as well
14th Jul, 2015
One word - AMAZING Delicious, simple quick and easy to make, I made these with my 2 year old. Also had them with chocolate and vanilla custard was yum!
11th Jan, 2014
This is 10 year old daughter made these by herself, with only a little help from me! The best brownie receipe I have found yet.
3rd Oct, 2013
Made these 2nyt partner said it was best thing he ever tasted wish we'd had bit ice cream in !!
trinaz's picture
21st Jun, 2013
: )


9th Apr, 2020
Tasty but really thin, is it supposed to be this thin, like 2cm?
Katherine Montgomery's picture
Katherine Montgomery
1st Feb, 2020
Try it with just one egg, even more squidgy texture, Really good! (Oh, and butter. Never margarine. Read about margarine, then throw it away.)
10th Dec, 2019
Absolutely delicious brownies, and I’m not normally a fan of brownies , I’ve made this recipe several times now and everyone who’s had some have loved them . I made some this weekend using snickers bars , and used 50g of peanut butter with 50g butter to replace the margarine. I also added a couple of squares of strong dark chocolate and reduced the sugar by 70 g . Absolutely fabulous.