The Originators of Quick & Easy Cooking!


Classic Cakes: 24 Easy Cake Recipes to Enjoy Year-Round
Bonus: Get our newsletter & special offers for free. We will not share or sell your email address. View our Privacy Policy
Peanut Butter Marshmallow Cake

- SERVES
- 20
- COOK TIME
- 30 Min
Two of your favorite flavors come together in this delicious cake recipe. Our Peanut Butter Marshmallow Cake is topped with a fluffy layer of marshmallow creme and a creamy-smooth peanut butter frosting that's oh-so-delectable and simply irresistible!
What You'll Need
- 2 tablespoons peanut butter
- 2 cups granulated sugar
- 1/2 cup (1 stick) butter, melted
- 4 eggs
- 1 teaspoon vanilla extract
- 1 1/2 cups all-purpose flour
- 1/4 teaspoon salt
- 1 (7-1/2-ounce) jar marshmallow creme
- FROSTING
- 3/4 cup (1-1/2 sticks) butter, softened
- 1/4 cup peanut butter
- 1 1/4 cups confectioners' sugar
What to Do
- Preheat oven to 350 degrees F. Coat a 9- x 13-inch baking dish with cooking spray.
- In a large bowl, combine peanut butter, sugar, butter, eggs, vanilla, flour, and salt; mix well. Spread batter evenly in baking dish.
- Bake 30 to 35 minutes, or until toothpick inserted in center comes out clean. While hot, spread evenly with marshmallow creme. Let cool.
- In a medium bowl, mix Frosting ingredients until smooth. Spread evenly over top of cake.
Up Next:
Nutritional InformationShow More
Servings Per Recipe: 20
- Amount Per Serving % Daily Value *
- Calories 320
- Calories from Fat 135
- Total Fat 15g 23 %
- Saturated Fat 8.1g 41 %
- Trans Fat 0.5g 0 %
- Protein 3.7g 7 %
- Amount Per Serving % Daily Value *
- Cholesterol 68mg 23 %
- Sodium 176mg 7 %
- Total Carbohydrates 44g 15 %
- Dietary Fiber 0.6g 2 %
- Sugars 33g 0 %
bsgeb 7769983
May 01, 2017
I loved this recipe. I would call it a "bar" not a cake, though. It is very dense. I would have given this five stars, not four, had the "doneness" been even throughout. I tested the bars at 30 minutes with a toothpick, and it was "clean." My husband and I both thought the middle tasted a bit raw (definitely a turnoff). I will bake this for 35 minutes next time, no matter what my toothpick tells me! We loved the meld of flavors though and the outside pieces were chewy and excellent!"
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
earlyrussell1953 0959827
Apr 27, 2017
I used milk chocolate icing in place of the peanut butter icing and it was so good.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
Krypta night
Apr 27, 2017
So I screwed up this very simple recipe and added the marshmallow creme right in the batter. I thought I ruined it but i went with it anyway. After cooking i poured the frosting on top and then put it in the fridge. Its actually delicious! So if you add the marshmallow in by accident just go with it.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
acook 8340041
Dec 02, 2016
I really liked this recipe. It's definitely a dense cake, so if you're not into that, this probably isn't the cake for you. Myself, on the other hand, I really liked the dense peanut butter cake and the two layers of frosting! It pairs perfectly with a glass of cold milk.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
mrspansy2005 4257612
Oct 21, 2016
This Gemini thinks it was awful.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
veggievick 6763809
Sep 17, 2016
I was nervous about making this since it has no leavening so I followed the recipe very carefully. I tested it with a toothpick....it came out clean so I removed the cake after 30 minutes. The "cake" was so sticky and sweet, the word cake is a misnomer.....it doesn't resemble cake at all. I did spread on the marshmallow cream, and the icing (which is very good). It's just too sweet and sticky for me......maybe the others who eat it will like it, as it's for dinner tonight. I don't think I'll make it again.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
CoreyB
Apr 09, 2016
Is this cake rather dense? I don't see any leavening in the ingredients.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE

Test Kitchen Team
Apr 11, 2016
Hello - Yes, this is a denser cake (and a very delicious one!). Enjoy!
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
acook 8340041
Mar 09, 2016
I never really liked fluffer nutter sandwiches but this cake recipe is DELICIOUS. I recommend it to anyone looking for a not so ordinary cake.
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE
SpicyGirl
Mar 09, 2016
Reminds me of a cake my grandma used to make. Tasty!
- REPLY
- WAS THIS HELPFUL? YesNo
- REPORT ABUSE

Report Inappropriate Comment
Are you sure you would like to report this comment? It will be flagged for our moderators to take action.
Thank you for taking the time to improve the content on our site.
LATEST TV RECIPE & VIDEO
Hearty Chicken & Corn Soup
Our Hearty Chicken Corn Soup is going to warm up your kitchen and the hearts of everyone gathered around the kitchen table.