Meet the ultimate Peanut Butter Cake. A Milk Bar-inspired cake with three layers of peanut butter cake, peanut butter cream cheese frosting and homemade chocolate cookie crumbs.
Say hello to my seriously good Peanut Butter Cake ❤️
A three layer pb cake filled with melt-in-your-mouth cream cheese frosting and plenty of cocoa-laden chocolate cookie crumbs. This Milk Bar-inspired Peanut Butter Cake is as delicious as it is p-r-e-t-t-y.
If you can eat peanut butter with a spoon and adore all things cake AND cookie, this is the perfect dessert for you.
Last month, my husband and I went on holiday to Los Angeles and New York. And one of the BEST things we did on the trip was a cooking class at Milk Bar in Los Angeles.
We had so much fun making one of their classic birthday cakes and their birthday cake truffles. I got to wear a pink headband, play with frosting and sprinkles, and eat cake for days. It was the BEST.
I was so inspired after learning how they make their famous naked cakes, and I knew the minute I got home I wanted to create my own version. And here she is 👇🏻
My perfect Peanut Butter Cake. The cake itself has a boatload of peanut butter baked right into the batter, so it’s moist, soft and sweet (but not too sweet). But let’s be real – the star of the show is that peanut butter cream cheese frosting.
You’ll want to face plant into the bowl of frosting alone. The cream cheese makes it extra luscious and there’s a heap of peanut butter in the frosting as well. Ya know, because this is a serious Peanut Butter Cake.
One thing that Milk Bar does so well, is adding texture to their cakes. So instead of your cake being soft with soft frosting, they add a crunchy element by making their own cookie crumbs. I’ve used cookie crumbs in many of my cakes before, including my Hummingbird Cake and my Death By Chocolate Cake.
They’re the best. I can (and do) eat them by the handful.
So this is how it goes – peanut butter cake, a little peanut butter frosting, a handful of chocolate cookie crumbs, more peanut butter frosting. Repeat.
HOW TO MAKE A THREE LAYER PEANUT BUTTER CAKE
Milk Bar bake their cakes in a quarter sheet pan and then cut out the three layers. This means your cake bakes very evenly and quickly. You also don’t have to clean three baking pans – win win.
You will need:
- One quarter sheet pan (9 by 13 inch)
- 6-inch cake ring
- A sheet of acetate (at least 6 inches high)
What size is a quarter sheet pan?
9 inch by 13 inch.
So how do you get three layers out of one quarter sheet cake?
You cut out two perfect 6 inch cake layers. You can use a 6 inch cake cutter or do it by hand. For the final layer, you can cut two semi-circles out with the leftover cake and then join them together when you assemble the cake. Let me show you >
What if I don’t have a quarter sheet pan?
If you don’t have a quarter sheet pan and you don’t want to buy one, you can make this cake as a regular three layer 6 inch cake or a two layer 8 inch cake.
How do I assemble the cake?
You will need a cake board, a 6 inch cake ring and a sheet of acetate. You need to place the acetate inside the cake ring and then build the layers. Once the cake is set and stable, you can remove the cake ring and the acetate sheet.
What order are the layers?
- Peanut butter cake (the two halves)
- Cream cheese frosting
- Chocolate cookie crumbs
- Cream cheese frosting
- Peanut butter cake
- Cream cheese frosting
- Chocolate cookie crumbs
- Cream cheese frosting
- Peanut butter cake
- Cream cheese frosting
- Chocolate cookie crumbs
MORE LAYER CAKE RECIPES TO TRY:
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Let’s Bake
Peanut Butter Cake
A tall three layer 6-inch Peanut Butter Cake with cream cheese frosting.
Ingredients
Peanut butter cake
- 230 grams (1 cup / 2 sticks) unsalted butter, room temperature
- 180 grams (1 cup) brown sugar
- 100 grams (1/2 cup) caster sugar or granulated sugar
- 250 grams (1 cup) smooth peanut butter*
- 1 teaspoon vanilla extract
- 3 large eggs, room temperature
- 1 and 1/2 teaspoons baking powder
- 1/4 teaspoon salt
- 280 grams (2 cups) plain flour or all purpose flour
- 180 ml (3/4 cup) full fat or whole milk
Peanut butter cream cheese frosting
- 250 grams (1 and 1/4 cup) full fat block cream cheese, room temperature
- 115 grams (1/2 cup / 1 stick) unsalted butter, room temperature
- 125 grams (1/2 cup) smooth peanut butter
- 1 teaspoon vanilla extract
- 435 grams (3 and 1/2 cups) icing sugar or powdered sugar
- 2–3 tablespoons full fat or whole milk
Chocolate cookie crumbs
- 105 grams (3/4 cup) plain flour or all purpose flour
- 50 grams (1/4 cup) caster sugar or granulated sugar
- 1 tablespoon cornflour or corn starch
- 3 tablespoons cocoa powder
- 60 grams (1/4 cup) unsalted butter
Instructions
- Peanut butter cake
Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Grease and line a quarter sheet pan with baking or parchment paper. - Place butter and sugars in a large mixing bowl. Beat together with an electric mixer on medium speed until pale and creamy. Add peanut butter and vanilla and mix together until smooth and combined.
- Next, add eggs, one at a time. Beat on a low speed to combine. Don’t worry if the mixture looks curdled – this is normal.
- Add baking powder, salt and half of the flour, followed by all of the milk. Beat on a low speed to combine, then add remaining flour. The cake batter should be thick and smooth.
- Pour batter into prepared pan and bake for approximately 25-30 minutes or until cake is golden brown and a skewer inserted in the middle comes out clean. Leave in pan to cool completely.
- Chocolate crumbs
Next, make your chocolate crumbs. In a large mixing bowl, add plain flour, sugar, cornflour and cocoa powder. Whisk together. Melt your butter and add it to the mixture, stirring until it forms wet crumbs. - Pour this mixture out onto a baking tray lined with baking paper and spread out into one layer. Bake for 10 minutes, then leave to cool completely.
- Peanut butter cream cheese frosting
To make the cream cheese frosting, add butter and cream cheese to a large mixing bowl. Beat with an electric mixer for 2-3 minutes until smooth and creamy. Add peanut butter and vanilla and beat briefly. - Then, add sugar, 1 cup at a time, along with 2 tablespoons of milk, and continue to beat until smooth. If the frosting is too thick, add an extra tablespoon of milk.
- Assemble the cake
Gently remove cooled cake from pan and remove baking paper. Cut out three 6-inch layers using a 6-inch cake ring. Note the diagram above – you’ll get two whole layers and then two halves. - Place a 6-inch cake ring on a cake board or plate. Line the inside of the cake ring with a sheet of acetate. Place two half pieces of cake at the bottom. Press down the cake firmly. If there are any gaps, use extra cake scraps to fill in the holes and press down very firmly to make one even layer.
- Next, add a thin layer of cream cheese frosting. Scatter over 1/3 of the cookie crumbs. Add more cream cheese frosting on top.
- Add another layer of peanut butter cake on top and press down firmly. Add more cream cheese frosting. Add another 1/3 of cookie crumbs. Add more creamy cheese frosting on top.
- Add final layer of peanut butter cake on top and press down firmly. Add the remaining cream cheese frosting and scatter over the final chocolate cookie crumbs.
- Place cake in the fridge for at least 2 hours to set. Cut and serve.
Notes
*Peanut butter: I recommend using a processed full fat peanut butter like Bega, Jif or Skippy.
Jamie says
The cake itself is SO MOIST, probably on account of the peanut butter. I’m so happy with it. I did add the standard Milk Bar cake vanilla milk soak on each of the cake layers for the lasting moistness and longevity of the cake but the cake scraps were delightful to snack on. Made this as a treat for myself (and to share with a friend) for Valentine’s Day. Thanks for the recipe. It’s a keeper.
★★★★★
Jessica Holmes says
Yes! Love hearing that Jamie. Thank you for your kind feedback.
Grace says
First time making a PB cake and it was a huge success! I’m wondering if this cake can be frozen or how long it’s good for in the refrigerator.
★★★★★
Jessica Holmes says
I’m so glad you enjoyed it Grace! Yes you can absolutely freeze the cake, or it’ll keep well for 2-3 days in the fridge.
Amanda says
How full should a 9in pan be filled if there will a little batter left over?
Jessica Holmes says
Hi Amanda, if you are going to bake this one using a 9-inch cake pan, I’d recommend using two pans. Two 8-inch cake pans would be ideal, or three 6-inch pans.
Michelle says
Hi would it be alright to use a 9inch round pan for this recipe?
Jessica Holmes says
Hi Michelle, this recipe will make a two layer 8-inch cake or a three layer 6-inch cake. If you want to use a 9-inch pan, you’ll have some leftover batter so you could perhaps make a couple of cupcakes as well.
Alison says
This is my favorite cake to bake! I’m gluten free and I’ve made this one as well as your birthday cake milkbar recipe and both work perfectly with the 1 to 1 Gluten free flour! I can’t wait to try more of your recipes gluten free.
★★★★★
Jessica Holmes says
Oh that’s wonderful to hear Alison! I appreciate the feedback with the gluten free flours too – so glad they worked out for you!
Terri says
Thank you so much for this. It is delicious!!! My son requested this for his birthday cake (after we made it for his dad). I’m really glad he requested it because it’s amazing, and the icing…. I’ve had dreams of that icing!! Have you ever done a milk soak with this cake like you with the Milk Bar birthday cake? Loved that added feature to the cake.
★★★★★
Jessica Holmes says
Hi Terri, I’m so glad you and the family loved it! The icing is sooo good isn’t it. You could totally do a milk soak for this one too. Would work well I think!
Rosemary says
Can I use cake flour instead of AP?
Jessica Holmes says
Hi, I haven’t tried!
Sarah says
Can you make two 9×13 and just cut them with 9 inch round pans to make it bigger
Jessica Holmes says
Hi Sarah, do you mean if you want a three or four layer 9 inch cake? I haven’t tried so not 100% sure how many layers you’d be able to squeeze out of it, but it should work.
Alexis G says
I made this for a work party and I was asked about a dozen times what bakery I purchased this cake from. What a rave review! I did end up doing a fully frosted cake as I had a ton of frosting left (I think I didn’t use as much as I should have between the layers). I also prepared the cake and frosting the night before, refrigerated layers in plastic wrap, and the cake was not dry at all the next day. I would absolutely make this again! Can’t wait to try more recipes from your site.
★★★★★
Jessica Holmes says
Yay! Thank you so much for your lovely review Alexis! By those rave reviews, it sounds like you absolutely nailed the recipe. Well done!
beth says
Hi! I’m making this in the UK and I just wondered what type of brown sugar is needed?
Thanks x
Jessica Holmes says
Hi Beth, you can use either light or dark brown sugar.
Jennifer G says
This cake is so easy and it’s absolutely delicious!!! It was a huge hit and I’ll be making it again 💯!
I didn’t have the right pans so I used 3x 8 inch pans so I’d still have three layers and it turned out perfectly!
Thanks for the awesome recipe 🙂
★★★★★
Jessica Holmes says
Yay! Love hearing that Jennifer! Thank you for the kind feedback.
Liz says
I made this cake for my husband’s birthday and it was incredible! He said it was the best cake I’ve ever made, and that is saying A LOT! The frosting tastes like peanut butter and honey, it is so luscious. The entire recipe was not complicated and took me less than 2 hours total, which is a fraction of what I’ve spent making other cakes. I’ll definitely make this again!
★★★★★
Jessica Holmes says
Aw I love hearing that Liz! Thank you for the kind feedback!
Jacqi says
I was so excited when this said a six inch cake as I just bought some six inch pans, but this seems like a waste of cake to cut them out of a sheet cake. Do you have a recommendation for bake time/temp if I wanted to bake it in the 6in pans?
Jessica Holmes says
Hi Jacqi, yes you can bake it in six inch cake pans if you prefer. Baking temp and cooking time will be the same.
Wendy says
I’m making the Milk Bar Banana layer cake but subbing your peanut butter cake instead of banana cake
So will have peanut butter cake with banana cream peanut crunch chocolate ganache. Fingers crossed
Jessica Holmes says
That sounds incredible Wendy!
Karen says
I’m making this for my daughter’s birthday. I always ask her what kind of cake she wants a month before and this is way easier to make than the lime one last year. I just finished everything just have to put it together for tomorrow. Love peanut butter so I’ll probably love this one
Jessica Holmes says
Awesome, I hope you and your daughter love it!