Cake Mix Chocolate Whoopie Pie with Peanut Butter Filling


Who loves whoopie pies???? I do! I wanted to try a chocolate one with peanut butter filling but I wanted to make it as easy as possible. There’s already enough I have to do already. Any time and brain energy saved is great!


So I was thinking about whoopie pies and how basically it’s kind of like two pieces of cake with frosting in the middle. But, the cake is more dense and the frosting isn’t quite as frosting like, if that makes sense :)


I then began to think then how easy would it be to use a box of cake mix? You don’t have all the control over every single ingredient like you do if you make it from scratch, but it does save some time and you can get a box for pretty cheap when on sale. But, I thought about how boxed cake mix is really fluffy. So I researched how to make it more dense. I found all kinds of solutions but decided to go with one that suggested adding yogurt as a thickening agent. Then I remembered how a ton of popular cake recipes out there right now use just a box of cake mix and something like a can of soda or a can of pumpkin, etc. I figured a thing of yogurt could work that way as well. So I gave it a try. I ended up having to add water as well, but for the cake part you only need 3 ingredients!

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Those three ingredients are:
-One box of cake mix
-around 7 oz. of yogurt (I used plain Greek yogurt)
-water called for on the back of the box

Stir together until mixed. Don’t stir a lot because the more you stir the more air gets in, creating a lighter batter.

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I put half the batter in a pan that is made for making whoopie pies.

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The other half of the batter, I just plopped on a cookie sheet. Of course, the best way to make them pretty is to actually pipe it out like I did on the pumpkin whoopie pies. But, I didn’t want to make the time for that :)

I cooked mine for about the same time as it said for cupcakes. But, keep an eye on them. Different cake mixes might take shorter or longer.

Once done, let them cool.

For the peanut butter filling, I just made my own variation of many recipes I have used before. It kind of happened partly because I didn’t have all the ingredients for any recipe I found, so I used what I knew worked and made it a smaller portion. But, I still had a good amount of frosting left over. And let me warn you, it is rich. So I don’t put a ton on the cake part.

Peanut Butter Filling Ingredients:
1 cup peanut butter
1.5 cups powdered suger
1 tb milk
1/2 cup butter at room temperature

First mix peanut butter with butter. When fluffy, add sugar until combined. Then add the milk until desired consistency is obtained.



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  1. Anonymous says

    I absolutely love peanut butter and chocolate! I made these tonight with my daughter. I’ve never made whoopie pies before so I didn’t know how much batter to put on the cookie sheet. I could’ve gotten three to four out of one lol :) They were very, very good!

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