Whoopie Pie Cake

Pan of whoopie pie cake

Whoopie Pie Cake is an instant favorite for not only kids, but adults too! This delicious double-layer dessert is filled with sweet Marshmallow Buttercream! Try this easy chocolate cake recipe out at your next party!

Easy Double-Layer Chocolate Cake Recipe

Sometimes simple is better. Actually most times, yes? So this post is gonna be simple.

This Whoopie Pie Cake was sort of accidental.  Obviously not accidental in intention, but accidental in execution.

See, I was going to make this a super fancy, stack-o-whoopie pies piled up to make a giant gorgeous deconstructed type cake.

Unfortunately, ain’t nobody got time for that. Meaning me.  I ain’t got time for that. So I took the easy route.

It might not be as visually appealing as a giant stack of whoopie pies…I mean not much would…but it is incredibly tasty.

And also, you can actually slice it without holding your breath.

Which is kind of important, because I can only hold my breath for like 7 seconds before I’m certain I will faint.

Annnnnyway. Whoopie Pie Cake. Simple. Delicious. Make it.

How to Make a Whoopie Pie Cake With Cake Mix:

Whoopie Pie Cake | Cookies and CupsJust start with a chocolate cake mix.
Water being added to a stand mixer bowlListen to the directions, then add an extra egg.
Grease 2, 9×13 pans with butter and dust with cocoa powder.

Split the batter evenly between the 2 pans.
(Obviously if you don’t have 2 pans, just bake one at a time.)
Collage of chocolate cake batter in 2 glass 9x13 pansWhen the cakes are done, allow them to cool completely.
A baked 9x13 chocolate cake removed from the panMeanwhile mix up your filling. I’m talking butter, powdered sugar and Marshmallow Fluff…
Marshmallow fluff in a measuring cupWhen the cakes are cooled, plop that filling on the top of one of the cakes…
Whoopie pie filling piled on top of a 9x13 chocolate cake layer  Spread it out evenly, and place the other cake on top.
Whoopie pie filling being spread on top of a chocolate cake layerNext make your chocolate ganache.
This is actually an optional step, but not really 😉

Just heat up some heavy cream to almost boiling and then add in your chocolate chips, stirring until smooth.
Overhead view of heavy cream and chocolate chips in a saucepan with a whiskCool the ganache slightly and pour that over the top of the cake…
Chocolate ganache being poured over a chocolate cake layerSpread it to just about the edges of the cake and allow it to drip over the sides for dah-rama.
Collage of chocolate whoopie pie cake topped with chocolate ganacheLet it set up a little bit and that’s it y’all.
Dunzo.
Whoopie Pie Cake | Cookies and Cups

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Whoopie Pie Cake

  • Author: Cookies & Cups
  • Prep Time Prep Time: 25 min
  • Cook Time Cook Time: 20 min
  • Total Time Total Time: 55 min
  • Yield Yield: serves 12-15 1x
  • Category Category: Dessert
  • Method Method: Oven
  • Cuisine Cuisine: American

Description:

Whoopie Pie Cake is an instant favorite for not only kids, but adults too! This delicious chocolate cake is filled with sweet Marshmallow Buttercream! Try this easy whoopie pie cake recipe out at your next party!


Ingredients:

Cake

  • 1 box Chocolate cake mix (prepared per package directions) + 1 extra egg
  • *cocoa powder for dusting the pan

Filling

  • 1 cup butter, room temperature
  • 2 cups Marshmallow Fluff
  • 3 cups powdered sugar

Ganache

  • 1/2 cup heavy cream
  • 1 cup semisweet chocolate chips

Instructions

Cake

  1. Preheat oven to 350°
  2. Grease 2 9×13 sized pans with butter and dust with cocoa powder, set aside.
  3. Prepare cake according to package directions, but add in an extra egg to the mix.
  4. Split the batter evenly between the 2 pans and bake for 15-20 minutes until a toothpick comes out clean.
  5. Allow cakes to cool completely.

Filling

  1. In stand mixer beat butter and Fluff together until smooth.
  2. Turn mixer to low and slowly add in powdered sugar. Turning mixer back up, continue mixing for 30-60 seconds until smooth.
  3. Spread the filling on top of one of the cakes. Top the filling with the other cake.

Ganache

  1. In small saucepan bring the heavy cream to almost a boil. Remove from heat and stir in chocolate chips. Allow to cool for 10 minutes and then pour over top of cake.

Notes:

you could also bake this in 2 9×9 round pans

Keywords:: whoopie pie cake recipe, whoopie pie recipe, how to make a whoopie pie, how to make whoopie pie cake, homemade whoopie pie recipe, homemade whoopie pie cake recipe, easy chocolate cake recipe, chocolate cake recipe, easy chocolate dessert recipe

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Hi! I’m Shelly and I’m an addict. Of the buttercream sort. I started this site a few years ago as a way to justify my sugary, buttery obsession with desserts. It has worked out well for me so far, because as it turns out you guys all love sugary, buttery desserts too! It feels good to know you're not alone, doesn’t it?

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elizabeth r jones
July 8, 2021 11:03 am

Could I make it in two 9 inch round cake pans? I don’t have the 9×13 pans.

Beth Gladfelter
June 25, 2020 4:36 pm

Ok so here’s my question….If I make this in a 9 x 13 couldn’t I just leave one of the cakes in the pan, top with filling and then put the other one on top? That way I wouldn’t have to take both the cakes out of their pan. Just wondering if that would work? Thanks!

Rebecca
February 21, 2019 9:39 am

If made in 2 9x9s, how long is the cake baked for?
I’ve made the 13×9 multiple times…..just saying, I eat half the filling before it makes it to the cake!

Sue
March 29, 2018 1:19 pm

I brought this to our Bible study group and it was a HUGE hit. Everyone raved about it! I added about 3/4 c mini chocolate chips to the cake batter, and I added some extra powdered sugar to the filling. I thought the filling tasted too much like butter before I added the extra powdered sugar. In hindsight, I wonder if a little vanilla might have been good in the filling. When it was all put together, the taste was amazing!

Diane
February 2, 2017 10:44 am

I make this every year for my birthday!!

kt mac
November 6, 2016 7:33 am

Fluff is made with eggs

Ellie
November 2, 2016 10:01 pm

This was DELICIOUS.I made the year-round cake. Glad I made it for someone else’s birthday and that it didn’t come home with me!

Nancey
October 5, 2016 8:50 pm

you said this cake does not have eggs, but the recipe does call for one egg. Is there a way to make it without the egg?

August 16, 2016 10:51 am

This recipe and picture made by mouth water by just looking and reading the recipe. It has to be delicious. There is a recipe called: Death by Chocolate. I think this could be the alternate name for this recipe. Thank you from this Chocoholic.

dl
May 10, 2016 12:28 am

Can I use my own chocolate cake or chocolate brownie recipe?

April 21, 2016 1:32 am

The only problem is I don’t have a plate long enough for a sheet cake~what do you recommend ?

Patty
April 10, 2016 9:02 pm

I made this cake for my family dinner and they just loved it. It really does taste like a Hostess cupcake, only better. It is delicious and rich tasting. Now they are asking me to make it again. Thanks for the recipe.

Katie
March 23, 2016 9:00 am

This looks great! Any tips to get the cake out of the pan neatly? It looks like you flipped them upside down? Thanks!!

Debra Rosenberg
September 18, 2015 2:07 pm

This cake is listed as egg free, then tells you to add an extra egg beyond what’s called for on the box of cake mix. Very disappointing……

Linda Brown
September 12, 2015 10:37 am

My wasitline expanded as I was making this cake. But darn it is sooooo good.

Shelly Hi! I’m Shelly and I’m an addict. Of the buttercream sort. I started this site a few years ago as a way to justify my sugary, buttery obsession with desserts. It has worked out well for me so far, because as it turns out you guys all love sugary, buttery desserts too! It feels good to know you're not alone, doesn’t it?

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