Friday, 31 January 2014

Peanut Butter & Chocolate Chip Overload Ganache Cookie Cake

 You know how sometimes you take really bad pictures that you don't ever think should see the light of day! Well, that's what happened with this bake! I made this for Byron's birthday last April whilst we were still living in Vancouver...he had been away for a week on a forestry trip in the middle of nowhere up North and my sister and mom had arrived from England 3 days before he got back.  We had been busy touring Seattle and Vancouver Island and had been surviving on very little sleep, it was a hectic time but I knew no birthday could pass without sufficient delicious celebrations! hence this cake! but also hence why the pictures were a bit of an afterthought, it was super dark once I finished making it and we were all just too desperate to eat it for me to faff around!

 So I wasn't intending to blog it, but I came across these pictures today and remembered how decadently delicious it was, and how many peanut butter lovers I know there are out there who need to know about this cake!

So please forgive the pictures...and let's talk about the cake!


 It is essentially a giant cookie, baked in a cake pan...but not just any cookie, a cookie filled to the brim with not only chocolate chips but also peanut butter chips!

Once the cookie has baked, you cover it in some deliciously creamy marshmallow fluff, which has been heated slightly so it's easier to spread out.  You then throw mini marshmallows, micro chocolate chips and mini peanut butter cups on top (I may or may not have waited for the fluff to cool so my toppings all melted into the fluff which doesn't make for the prettiest pictures but it was rather delicious still!) 

At this point, in the original recipe you would whip up a batch of peanut butter frosting and cover the sides and top of the cake...only I had run out of icing sugar - I know, what kind of baker runs out of icing sugar! 

So since I was still in my ganache cures everything phase...I whipped up a batch of peanut butter chocolate ganache and just piped around the top of the cake with that, adorning each little swirl of ganache with either a peanut butter cup or a micro marshmallow.  

Every ounce of this cake is decadent, and not for the faint hearted! but if you like a lot of sugar, and a lot of peanut butter, and chocolate then this cake is surely for you! My husband LOVED it!

and I fell in love with peanut butter chocolate ganache - who knew it would be so tasty!

Peanut Butter & Chocolate Chip Overload Ganache Cookie Cake:
Serves 12-14
Adapted from Sprinkle Bakes

Peanut Butter and Chocolate Chip Cookie:

1 cup unsalted butter, softened
1/2 cup caster sugar
2/3 cup soft light brown sugar, packed
2 eggs
1 tsp vanilla extract
2 cups plain flour
1 tsp salt
1 tsp cream of tartar
1 tsp bicarbonate of soda
1 cup milk chocolate chips
1 cup peanut butter chips

Preheat oven to 180 degrees C.
Grease a 10 inch cake pan with butter and line the bottom with a circle of parchment paper.  Set aside.

In a large bowl, beat together the butter and sugars until well combined.  Add in the eggs and vanilla extract.  Beat again until well mixed.

In a separate medium bowl, whisk together the flour, salt, cream of tartar and bicarbonate of soda.  Pour flour mixture into the butter and mixture and mix until a thick batter forms and the flour is just incorporated.  Add both types of chips and mix on the lowest speed until combined.  

Pour batter into the prepared pan and spread evenly with a spatula so the cookie is flat on top.  Bake for 20-25 minutes or until a knife inserted in the middle comes out clean.  Remove from oven and let cool in the pan for 10 minutes.  Turn cake out onto a wire rack to cool completely.

Marshmallow Topping:

1 cup marshmallow fluff
3 tbsp micro mini chocolate chips
1/2 cup mini marshmallows
15 mini peanut butter cups, halved

Spray a small bowl with cooking spray and place the 1 cup marshmallow fluff in the bowl.  Heat gently in the microwave for 20-30 seconds, or until just loosened and pour into the centre of the cookie.  Spread evenly over the top.

Wait for it to cool, or if you're impatient like me throw all the toppings on top.

Peanut Butter Chocolate Ganache:

5 oz. dark chocolate
1/4 cup peanut butter
1/2 cup double cream, heated

Chop up the dark chocolate into small pieces and put into a bowl.  Add the peanut butter to the bowl.
Heat up the cream gently in a saucepan and once hot, pour into the bowl of chocolate and peanut butter.  Leave it for 2 minutes to melt the chocolate, and then stir like crazy with a spoon until all the chocolate has melted and the peanut butter has been incorporated into the ganache.

Put it into a piping bag, and pipe swirls of ganache around the outside of the cake.

Top each alternate swirl with a chopped mini peanut butter cup, or a micro mini marshmallow.

Eat and enjoy!


  1. Looks beautiful - I love how the peanut butter cups are part submerged, like they're buried in snow!

  2. This just looks like heaven on a plate, love the idea of using heated fluff to spread on the cookie! Yum!

  3. Oh man, I wish I had a slice (or 2!) of this right now!! It looks so divine!!

  4. ooh i've never heard of a cookie cake before! It makes a lovely (and equally indulgent!) change to a multi layer birthday cake.

    P.S. My milk glass cake stand was ordered from Liberty London. It's a great sturdy cake stand and just as gorgeous as I had hoped. Now I'm starting to eye up other sizes and colourways!



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