Sweet Potato Whoopie Pies with Toasty Marshmallows

A post two days in a row!? As much as I would like to say that I’m on top of things, this is really just me trying to cram in one more Thanksgiving-ish post before tomorrow.

Sweet Potato Whoopie Pies -  bethcakes.com

My senior year of college, I worked at a Gigi’s Cupcakes. I absolutely loved working there, but my last semester was so crazy and I had to quit back in February. (My last day was the day before Valentine’s Day actually, and it was the most insane thing I’ve ever experienced.) Plus, you can only be around cupcakes for so long before you want to Hulk-smash them all. (Yeah, it’s possible to feel that way toward cupcakes.) But. We had (they probably still have) a sweet potato cupcake that was the bomb. Seriously, so so good. That was the first time I really realized that sweet potatoes are awesome in baked goods. I mean, obviously there’s sweet potato casserole at Thanksgiving, but it’s just so mushy! You know? Probably not. I’m just weird.

Sweet Potato Whoopie Pies -  bethcakes.com

Obviously sweet potatoes and toasty marshmallows are a match made in confectionery heaven, so why not sandwich a melty marshmallow right in between some sweet potato whoopies?

I fell in love with whoopie pies like, what? Two years ago? I made these red velvet whoopie pies for a BCS National Championship game viewing party, and they were a perfect post-game celebratory treat. I made some mocha whoopies and mint chocolate whoopies for a couple bake sales in college as well (referencing back to college still feels weird to me). But I really don’t make them that often, and I’m not sure why. They’re so easy and don’t require too much clean up. Hopefully there will be more in the future for bethcakes!

Sweet Potato Whoopie Pies -  bethcakes.com

On an unrelated note – I think I’ve realized that if I try to “style” photos with props and things, it just doesn’t turn out right. I have tons of cute little plates that I usually buy on impulse at Target, I’ve got some super cute silverware, tea towels, etc. But I just can’t get the hang of it, you know? I’m really obsessed with looking at food photography and styling in other pictures and on Pinterest, but simpler seems to be better for me. So for now, I’ll be sticking to a single cake plate or rusty old baking sheet. At least until I have enough room to store all my stuff properly and it isn’t all shoved in my closet. ;)

Sweet Potato Whoopie Pies -  bethcakes.com

For the marshmallows – when I made these whoopie pies, I made a try of small-ish ones, and a tray of HUGE ones. I bought a bag of jumbo marshmallows (not just regular marshmallows, the JUMBO MARSHMALLOWS) for the larger whoopies, and for the smaller ones, I just cut the marshmallows in half. So, if you want to make just the smaller whoopie pies, you can just buy regular marshmallows.

Sweet Potato Whoopie Pies with Toasty Marshmallows


  • 2 1/4 cups all purpose flour
  • 1 tsp baking soda
  • 1 tsp baking powder
  • 2 tsp cinnamon
  • 1/4 tsp nutmeg
  • 1/2 cup butter
  • 1/2 cup granulated sugar
  • 1/2 cup light brown sugar, packed
  • 2 eggs
  • 1 tsp vanilla
  • 1 cup mashed (cooked) sweet potato, (I cooked mine in the microwave for 8 minutes)
  • 1/2 cup buttermilk
  • 1 bag of JUMBO marshmallows


  1. Preheat oven to 350 degrees and line two baking sheets with parchment paper.
  2. In a medium sized bowl, combine the dry ingredients: flour, baking soda, baking powder, cinnamon, and nutmeg. Carefully stir them together.
  3. In the bowl of a stand mixer (or medium sized bowl with a handheld mixer), cream butter and both sugars on medium speed until light and fluffy.
  4. Add the eggs and vanilla and mix well.
  5. Next, add the sweet potato and mix until combined.
  6. Add half of the dry ingredients and half of the buttermilk to the sweet potato mixture. Mix until incorporated. Repeat with the second half of the dry ingredients and buttermilk.
  7. Using a cookie dough scoop (jumbo for jumbo whoopies and jumbo marshmallows, normal sized scoop for normal sized whoopies and normal sized marshmallows), scoop batter onto the prepared baking sheets, about 2 inches apart. If you run out of room on the baking sheets, you can just do a second round when the first trays come out of the oven.
  8. Bake for 10 minutes or until tops are set. After a couple minutes, use a spatula to transfer whoopies to a wire rack to cool completely. (Repeat with remaining batter if you have any.)
  9. Once whoopies are cool, turn the oven to broil. Place half of the whoopies on a parchment paper-lined baking sheet. Place a marshmallow on top of each whoopie. Place in the oven and watch for 30 seconds. It's very important for you to stand right at the oven, even with the door cracked open a little, and watch the marshmallows toast so they won't get burned. It doesn't take very long.
  10. Top toasted marshmallows with the second half of the whoopies and press down slightly.
  11. Enjoy!

Recipe by bethcakes. All images and content are copyright protected. Please do not use my images without permission. If you would like to republish this recipe, please re-write the recipe in your own words, or link back to this post for the recipe. Thank you.



  1. says

    Sweet potatoes are totally underrated in desserts! Pumpkin gets all the love but sweet potatoes are at least as good, if not better. I have a southern baking book and it has all sorts of great sweet potato recipes (pound cake, pie, etc) and I keep meaning to try them soon.

    Also, I think one of the best things about blogging is being able to figure out your own personal style. It’s so tempting to see other people’s blogs and photographs and want to recreate it, but too often it’s as you describe–it just doesn’t feel “right.” These pics are great, I think you should keep doing what you’re doing because it’s working!

  2. says

    It’s hard to believe that I’ve yet to make a whoopie pie. After all these years of blogging…I still haven’t tackled them. These just might need to be the ones! I love sweet potato! Thank you for sharing!

  3. says

    These look sooo good! I love a good whoopie pie :) and with marshmallow…swoon. I’m totally with you on the food styling thing…I try sometimes, but usually, I find simpler is better.

  4. says

    I can only imagine what it would have been like to work at a cupcake shop on Valentines Day! Crazy! It’s hard enough to keep up with the holiday recipes while food blogging. ;) These whoopie pies look delish, I’ve never tried whoopie pies but I love sweet potato in baked goods so I bet I’d love these!

    • says

      It was insane! Some people came from a different shop just so they could stay there all night and bake cupcakes so we’d have enough for Valentine’s Day. Anyway, whoopie pies are just fun sometimes. :)


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