Fluffernutter Cake – tender and fluffy white cake layers with banana cream filling, toasted marshmallow filling, and peanut butter buttercream.
If your family is anything like mine, fluffernutter sandwiches are a go-to favorite for lunches. I grew up on them and now my kids are too! Are you familiar with fluffernutters? It’s a simple peanut butter and marshmallow cream sandwich. Growing up, however, my mom also cut up banana slices and layered them between the creamy peanut butter and sweet marshmallow cream. Her way of adding a serving of fruit, I think 😉
However you slice it, a fluffernutter has all the makings of a great cake – probably one of the best cake recipes! These flavors are some of my favorites: vanilla, banana, peanut butter and marshmallow. How can you go wrong?!
Ingredients You’ll Need for the Fluffernutter Cake
Before you get baking, make sure you have the following on hand!
- Cake flour
- Granulated sugar
- Egg whites
- Unsalted butter
- Banana pudding mix, instant
- Vanilla extract
- Sweetened condensed milk
- Sour cream
- Baking powder
- Powdered sugar
- Heavy whipping cream
- Peanut butter
- Marshmallow cream
Light and Fluffy White Cake
For the cake layers, I wanted to go with something that resembled white bread – tender, fluffy and classic. My Classic White Cake has just the layers for this cake. I made one and a half the recipe so my layers would be a little thicker, allowing me to cut them in half to get six layers to hold all the filling we’re about to make.
Note: When doing 1.5x a recipe, or even when doubling or splitting a recipe, I think it’s best to use the grams given in the recipe to get the most accurate measurements.
Banana Cream Filling
While I know adding bananas to a fluffernutter isn’t the most common thing, it’s seriously the best flavor addition and I’ll just need you to trust me on this one. I’ve added my Banana Cream Filling from my Banana Cream Cake, as well as fresh bananas. However, and this is a big however, if you’re not serving the cake the same day you assemble it, DO NOT use fresh bananas. They just brown too easily, even when you freeze the cake.
Peanut Butter Buttercream
It’s no secret how deep my love for peanut butter runs, so covering this cake in my Peanut Butter Buttercream was a no-brainer. It’s sweet and salty, and oh-so perfect for this Fluffernutter Cake.
Tip: If you want a little crunch in the cake, add chopped salted peanuts between the layers!
Toasted Marshmallow Filling
For the marshmallow element, I’ve included my Toasted Marshmallow Filling from my Ultimate S’mores Cake. It’s just one of my favorite things on the planet. It’s delicious in cake, but to be honest, dipping graham crackers in it might be at the top of my treat list!
How to Assemble the Fluffernutter Cake
After your cake layers cool to room temperature, you’ll want to torte your cake layers. Torte means cut the layers in half, horizontally. To do this, I like to use a cake leveler. You’ll move the textured wire to a height that divides the cake evenly. Then, with the leveler “feet” on the counter, you’ll move the leveler back and forth (like a saw), as you move across the cake. Once the layers are split and the other elements of your cake are complete, you’re ready to assemble the cake.
Follow the step-by-step picture instructions below, and be sure to add some straws or dowels to keep your cake in place. Because the cake is so tall and we have so many fillings, it may get wobbly.
Tips for Getting Cakes to Rise Evenly
Don’t forget to follow my go-to tips for getting your cakes to rise and bake well:
- Preheat your oven for 30 minutes prior to baking.
- Use good quality pans like Fat Daddio.
- Spray your pans with nonstick spray and line with parchment paper.
- Don’t overmix your cake batter once you add the dry ingredients.
- Use room temperature wet ingredients.
- Use fresh baking powder.
- Bake until a toothpick inserted in the center of the cake comes out with a few moist crumbs on it.
Other Cakes You May Like
- Banana Peanut Butter Caramel Cake
- Peanut Butter S’mores Cake
- Banana Nutella S’mores Cake
- Chocolate Banana Peanut Butter Cake
- Banana Cream Cake