Microwave Mud Cake

    1 hour 8 minutes

    You will love how amazingly easy this dessert is to make. These quantities make 16 small portions - believe me, a small portion is plenty!

    45 people made this

    Serves: 16 

    • 250g butter
    • 2 cups (440g) white sugar
    • 1/2 cup (45g) unsweetened cocoa powder
    • 4 eggs
    • 2 teaspoons vanilla essence
    • 1 1/2 cups (185g) plain flour
    • 1/4 cup coarsely chopped walnuts
    • 1/4 teaspoon salt
    • 1/2 cup miniature marshmallows (mallow bakes)
    • 125g butter
    • 1/3 cup (85ml) milk
    • 1/4 cup unsweetened cocoa powder
    • 1/2 teaspoon vanilla essence
    • 4 cups (750g) icing sugar

    Preparation:20min  ›  Cook:18min  ›  Extra time:30min cooling  ›  Ready in:1hour8min 

    1. Put 250g butter or margarine into large mixing bowl. Microwave on high 1 to 1 1/2 minutes until melted.
    2. Stir in 2 cups white sugar and cocoa. Add eggs and vanilla; beat vigorously until well-blended. Stir in flour, nuts and salt. Let batter "rest" for 10 minutes.
    3. Pour into an 20x30cm pan. Place on a plastic trivet or inverted saucer in microwave. Microwave on medium 9 minutes, rotating dish 1/2 turn after 3 minutes.
    4. Microwave on high 3-5 minutes rotating dish 1/2 turn once until top is mostly dry with moist spots and a knife comes out clean. Sprinkle marshmallows evenly over top of cake. Let stand about 5 minutes until marshmallows are slightly melted.
    5. To make icing: Melt 125g butter in large bowl. Stir in 1/3 cup milk, 1/4 cup cocoa and 1/2 teaspoon vanilla. Add 4 cups icing sugar and beat vigorously until smooth. Spread evenly over marshmallows. Let stand on flat surface 30 minutes until slightly warm or cool completely. Makes 16 very rich servings as this is a very dense cake.

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    Reviews in English (36)


    I made half a batch to try this one out. Everything cooked very well, the consistency was good, it was pretty easy to make. All good points. I'm giving it 4 stars for those facts. We did NOT like it for only one fact: It was mega- hugely- super- SWEET! Just way too much for us. I guess we should have figured that out in the beginning considering the full batch uses 6 CUPS OF SUGAR! Wowee! Other people may love super-sweet things, but we don't. I'm not going to take off points for personal preference, as that's not fair. But I don't think we'll make it again.  -  09 Feb 2011  (Review from Allrecipes USA and Canada)


    It was super quick. I was craving something chocolate and this fixed it. I quartered the recipe and it cooked in 5 minutes. I topped it with chocolate syrup instead of making the frosting. I cooked it in a ramekin and it came ou perfectly. I'm going to try some new variations.  -  02 Feb 2008  (Review from Allrecipes USA and Canada)


    I finally tried this recipe, and the reviews were so right! This cake is so simple to make and it turned out very dense and rich like a brownie. It was almost too chocolately for my tastes but everyone else loved it!! Since it only takes 15 minutes to cook and in the microwave at that, I'm sure I'll be making this on a more regular basis when a quick dessert is necessary.  -  18 Jul 2005  (Review from Allrecipes USA and Canada)