Peanut butter chocolate cake

    1 hour 30 min

    This sweet and delicious cake has a secret ingredient added... The cake is moist, chocolaty and peanutty - a must for all chocolate and peanut butter lovers.

    33 people made this

    Makes: 1 20x30cm cake

    • 250g plain flour
    • 400g caster sugar
    • 250ml Dr Pepper soft drink
    • 3 tablespoons unsweetened cocoa powder
    • 2 eggs
    • 1 teaspoon bicarbonate of soda
    • 1 teaspoon vanilla extract
    • 225g butter
    • 125ml buttermilk
    • 75g mini marshmallows
    • 90g butter
    • 220g dark brown soft sugar
    • 170g peanut butter
    • 4 tablespoons milk
    • 100g chopped, unsalted dry-roasted peanuts

    Prep:30min  ›  Cook:30min  ›  Extra time:30min cooling  ›  Ready in:1hr30min 

    1. Preheat oven to 180 C / Gas 4. Lightly grease one 20x30cm baking tin.
    2. Mix together the flour and the caster sugar.
    3. In a saucepan, combine the Dr Pepper, cocoa and 225g butter; bring to the boil. Pour melted butter mixture over the flour and mix well. Stir in the beaten eggs, bicarbonate of soda, vanilla, buttermilk and mini marshmallows; mix well. Pour batter into the prepared tin.
    4. Bake at 180 C / Gas 4 for 30 to 35 minutes.
    5. Meanwhile make the peanut butter topping. Cream together the remaining 90g butter, dark brown soft sugar and the peanut butter. Add the milk and stir well. Mix in the nuts.
    6. Remove cake from oven and spread peanut butter topping over warm cake. Place cake under the grill, about 10cm from the heat source. Grill for just a few seconds or until topping starts to bubble. Do not scorch. Let cake cool at least 30 minutes before serving.


    If you can't find Dr Pepper, Coca Cola works a treat, too.

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    Reviews & ratings
    Average global rating:

    Reviews in English (25)


    I made this as a Valentine treat for the husband. Yikes is it SWEET! I left out about 1/4 cup of the sugar and it is still super sweet. If I make it again I might leave out a little more, maybe make it with 1.5 cups instead of the 2 called for...I mean you have DP, marshmallows, and that gooey sugary coating...I doubt the 1/2 cup of sugar will be missed!  -  14 Feb 2007  (Review from Allrecipes US | Canada)


    I got a request for Dr. Pepper cake. This recipe sounded pretty good so I gave it a try. The cake was sweet and moist. Everyone liked it and there were no leftovers.  -  08 Aug 2007  (Review from Allrecipes US | Canada)


    I added 1 1/2 tsp. cinnamon to the cake batter as per a similar recipe. Tasted like a moist chocolate cake - could not taste the Dr. Pepper in it. I used a chocolate glaze since I cannot eat peanut butter. Good cake, but don't expect any Dr. Pepper flavor.  -  03 Nov 2009  (Review from Allrecipes US | Canada)