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:
Just start with a chocolate cake mix.
Listen 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.)
When the cakes are done, allow them to cool completely.
Meanwhile mix up your filling. I’m talking butter, powdered sugar and Marshmallow Fluff…
When the cakes are cooled, plop that filling on the top of one of the cakes…
Spread it out evenly, and place the other cake on top.
Next 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.
Cool the ganache slightly and pour that over the top of the cake…
Spread it to just about the edges of the cake and allow it to drip over the sides for dah-rama.
Let it set up a little bit and that’s it y’all.
Dunzo.
Whoopie Pie Cake
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Prep Time: 25 min -
Cook Time: 20 min
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Total Time: 55 min
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Yield: serves 12-15 1x -
Category: Dessert
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Method: Oven
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Cuisine: American
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PinDescription:
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
- Preheat oven to 350°
- Grease 2 9×13 sized pans with butter and dust with cocoa powder, set aside.
- Prepare cake according to package directions, but add in an extra egg to the mix.
- Split the batter evenly between the 2 pans and bake for 15-20 minutes until a toothpick comes out clean.
- Allow cakes to cool completely.
Filling
- In stand mixer beat butter and Fluff together until smooth.
- Turn mixer to low and slowly add in powdered sugar. Turning mixer back up, continue mixing for 30-60 seconds until smooth.
- Spread the filling on top of one of the cakes. Top the filling with the other cake.
Ganache
- 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
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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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Could I make it in two 9 inch round cake pans? I don’t have the 9×13 pans.
sure!
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!
Sure you could do that!
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!
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!
★★★★★
I make this every year for my birthday!!
Fluff is made with eggs
★★★★★
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!
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?
Hi, I don’t believe I ever stated this cake is egg free. It isn’t, there is actually 4 eggs in the recipe… 3 that are required by the box cake directions PLUS one extra egg.
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.
Can I use my own chocolate cake or chocolate brownie recipe?
Oh yes, of course! Using a brownie, though, might be too dense, and when you slice it the filling might squeeze out 🙂
The only problem is I don’t have a plate long enough for a sheet cake~what do you recommend ?
A cutting board maybe?
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.
This looks great! Any tips to get the cake out of the pan neatly? It looks like you flipped them upside down? Thanks!!
Make sure to grease the pan completely and yes, I just flipped it out!
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……
Where is it marked as egg free? I would have never advertised it as such, since it does include eggs.
My wasitline expanded as I was making this cake. But darn it is sooooo good.
★★★★