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Peanut Butter Cake Filling - Comprehensive Guide

by SAIRA FARHEEN 28 Aug 2023
A Guide On Peanut Butter Filling For Cake

The peanut butter world is what we all know and love. 
Whether it’s spread on a slice of bread or savored straight from the spoon, that nutty goodness brings a smile to our faces. But what if I told you there’s more to peanut butter than meets the eye?

Picture this: transforming that beloved flavor into a delicious filling for cakes. As a baking lover, I have made all sorts of treats, but this peanut butter magic was something else.

I took it to a party, and guess what?

Not just the kids, but even the grown-ups liked it a lot.It was like a tasty trick that made everyone happy, big people and little people alike.

A Guide On Peanut Butter Filling For Cake

In this guide, I will share a complete guide on how to make an awesome peanut butter cake filling. We will also talk about the stuff you need. Like, choosing the right peanut butter, how to use it in your recipes, and the kinds of cakes that go perfectly with peanut butter filling.

We will also explore a variety of other cake fillings that nicely pair with the nutty richness of the peanut butter filling.

Ingredients for Peanut Butter Cake Filling Recipe

Here are the four main ingredients for making peanut butter cream filling:

➜ Creamy Peanut Butter (1 cup): This is the key player in the recipe. It brings that nutty, rich flavor we all love to the filling. It's like the main character that gives the filling its fantastic taste.

➜ Softened Butter (1/2 stick): Think of this butter as the helper. It gets along great with peanut butter, making the filling super smooth and easy to spread.

➜ Powdered Sugar (1 cup): This sweet ingredient adds a touch of sweetness to the filling. It balances out the flavors and makes the filling just right.

➜ Heavy Cream (4 tbsp): This creamy addition makes the filling velvety. It's like the secret ingredient that adds texture and makes everything come together perfectly.

Instructions for Making Peanut Butter Filling

1). Start by mixing creamy peanut butter and softened butter in a large bowl.

2). Use an electric mixer at medium speed to beat the mixture. This will help combine all the ingredients smoothly.

3). Beat the mixture for about 1-2 minutes until it's well combined and forms a uniform mixture.

4). Add confectioner's sugar to the mixture and continue beating until the texture becomes smooth.

5). Keep the mixer running until the filling achieves a creamy consistency without any lumps.

6). Now, introduce the heavy cream. Pour it in and continue to beat the mixture on medium speed for 1-2 more minutes. This will make the filling light and fluffy.

7). Your peanut butter cake filling is ready.

*Bonus Tip: Ready to bake, decorate, and amaze? RFAQK's cake decoration kits have everything you need: piping bags, cake leveler, and icing tips to help with peanut-butter-filled-cakes.

How To Fill & Layer A Cake With Peanut Butter Cream Filling?

Peanut butter cream is a delicious and versatile filling that can be used to fill and layer any type of cake. Filling and layering a cake helps to keep it moist and prevents it from drying out.

Here are the steps on how to fill and layer a cake with peanut butter cream filling:

1 ➜ Prepare Your Cake. Start with cooled cake layers that are level and ready for stacking. You can use the RFAQK cake leveler to ensure neat and even layers.

2 ➜ Secure the First Layer. Place the first cake layer on a cake board. This will be the base for building your cake.

#3 ➜ Create a Dam (Optional). If your filling is on the runnier side, you can pipe a ring of frosting around the edge of the cake layer. This acts as a "dam" to prevent the filling from oozing out.

4 ➜ Add the Filling. Spoon or spread the filling evenly over the cake layer, staying within the dam if you've created one. Be generous but not excessive; you want to create a balanced layer.

#5 ➜ Position the Next Layer. Gently place the second cake layer on top of the filling. Make sure it's centered and aligned.

6 ➜ Repeat the Process. If your cake has more layers, continue alternating between adding filling and cake layers until all layers are stacked.

7 ➜ Crumb Coat (Optional). For a professional touch, you can apply a thin layer of best cake frosting around the entire cake. This is known as a crumb coat and helps seal in any loose crumbs, creating a smooth base for the final layer of frosting.

8 ➜ Chill the Cake. Place the cake in the refrigerator for about 20-30 minutes. This allows the filling to set and makes the layers more stable for the final frosting.

9 ➜ Final Frosting. Apply a generous layer of frosting to the entire cake. Start with a thin layer, known as the "rough coat," to seal in any crumbs. Then, add a thicker layer for a smooth finish.

Tips and Tricks for Peanut Butter Filling

Want to make your peanut butter cake filling the best?

Check out these cool tips and tricks that will make your cakes extra awesome.

Also, I've got some fun combos you can try with peanut butter that will make your treats taste even more amazing.

Pastry Cream Filling with Peanut Butter

You can make super tasty peanut butter cream. It's not just yummy, it can go in eclairs, cream puffs, and between cake layers too. Think of it like a smooth pudding made with eggs and cornstarch but with peanut butter flavor.

And guess what? It tastes good. When you put this peanut butter cream inside your treats, they get even better. In eclairs, it's like a nutty surprise that makes them extra special. Cream puffs become like peanut butter clouds that you'll love. And when you use it between cake layers, your cake turns into something amazing.


  • Granulated Sugar (1/2 cup)
  • Cornstarch (2 tbsp)
  • Milk (2 cups)
  • Egg Yolks (4)
  • Smooth Peanut Butter (1/2 cup)
  • Pure Vanilla Extract (1 teaspoon)


  1. Start by combining granulated sugar and cornstarch in a saucepan.
  2. Gradually whisk in milk and heat it over medium heat until the milk starts steaming.
  3. Whisk the egg yolks in a large bowl.
  4. While whisking constantly, slowly pour the steaming milk mixture into the egg yolks to avoid curdling.
  5. Return the mixture to the saucepan and continue heating over medium heat until it boils and thickens. Make sure to keep mixing constantly.
  6. Once it thickens, remove it from the heat and strain the custard mixture over smooth peanut butter and vanilla extract in a heatproof bowl.
  7. Stir until the peanut butter is fully mixed in.
  8. Prevent skin from forming by placing plastic wrap directly on the custard's surface.
  9. Refrigerate the mixture for 3-4 hours or overnight.
  10. If it's too thick when you're ready to use it, simply whisk it to loosen it up.

Enjoy the goodness of Peanut Butter Pastry Cream! You can make it ahead of time and refrigerate it for up to 3 days.

*Bonus Tip: Try adding some chopped peanuts on top of your treats with peanut butter cream. It gives them a nice crunch and even more peanut flavor.

Now you know how to make Peanut Butter Cream that's super yummy.

Peanut Butter Raspberry Filling

Have you ever tried putting peanut butter inside raspberries?

Believe me, it tastes like magic.

Picture juicy raspberries bursting with creamy, nutty peanut butter.

It’s like raspberries' tangy kick joining hands with peanut butter's rich taste. Raspberries' natural sweetness and peanut butter's depth blend just right, making a balance that's tough to say no to.


  • Raspberries (1 pint)
  • Peanut Butter (2 tbsp)
  • Honey (1 tbsp)


  1. Start by gently washing the raspberries and letting them drain. Make sure they're really dry by gently patting them.
  2. In a bowl, mix the peanut butter and honey. This is where the magic begins – the sweet and nutty combo!
  3. Here's the fun part: Fill a Ziploc bag with the peanut butter mix. Use this bag to pipe the mixture into each raspberry. If you're feeling fancy, you can add mini chocolate chips on top for an extra pop of flavor.
  4. Now, pop your creation into the freezer for about 20 minutes. This helps everything set up and get ready to serve.
  5. When you're ready, take them out and get ready to experience a taste sensation that combines the tanginess of raspberries with the nutty goodness of peanut butter.

*Bonus Tip: Want to decorate peanut butter cakes? With RFAQK Cake Decorating Kits, your peanut butter cream filling will taste even better.

Decadent Chocolate Cake with Peanut Butter Filling

Think about how fancy chocolate meets the nutty peanut butter – it's like a yummy party in your mouth.

The deep taste of decadent chocolate and the smoothness of peanut butter create a feeling that's both soft and satisfying.The two flavors mix so well that every bite becomes a little moment of joy.

Making a decadent chocolate peanut butter cake filling is simpler than you might think. Just follow the steps for making the peanut butter filling as explained before. But this time, toss in mini chocolate chips for an extra burst of chocolatey goodness.

And here's the kicker: introduce additional chocolate chips to go right in the middle of your cake layers or on top of your cupcakes – you choose. As the finishing touch, shower your creation with chocolate sauce on top or pour melted ganache chocolate over it. If you're up for a homemade chocolate ganache, here's how:

  1. Take melted chocolate and heavy cream in equal parts for the ganache.
  2. Heat the heavy cream until it starts boiling.
  3. Pour it over the chocolate chips and let them sit without stirring for about 4 minutes.
  4. Whisk the mixture until it turns thick and velvety dark.

Peanut Butter Cheesecake Stuffed Strawberries

You won't believe the amazing snack I discovered – Peanut Butter Cheesecake Stuffed Strawberries. It's like a sweet explosion of strawberries and creamy peanut butter cheesecake in every bite. Trust me, these are a hit at parties. They're small, so no fuss, and everyone just loves them.

Picture this: a chill evening, you all wrapped up in your comfy spot, watching a movie. Now add these stuffed strawberries to the scene – sweet strawberries filled with this dreamy peanut butter cheesecake stuff. It's pure bliss, I tell you.

If you're into strawberries or peanut butter, you're gonna be hooked. They take the juicy strawberries and combine them with the nutty, creamy goodness of peanut butter.

And guess what?

Making them is a breeze. Just mix cream cheese, peanut butter, a bit of sweet, a dash of vanilla, stuff it in the strawberries, and there you have it.


  • 30 fresh strawberries (medium to large)
  • 8 ounces of chopped dark chocolate
  • Crushed peanuts for garnishing
  • 1 package (8 oz) of cream cheese
  • 1 cup of peanut butter
  • ¼ cup of powdered sugar
  • ½ teaspoon of vanilla extract
  • Decorative sprinkles for garnish


  1. Begin by removing the top leaves from each strawberry. Use a small knife or a melon baller to gently remove the center of the berries.
  2. Take the crushed peanuts and place them in a small bowl. Set this aside. Also, place the chopped chocolate in a separate bowl and melt it in the microwave for 30 seconds. If needed, continue melting in 10-second intervals until fully melted.
  3. Trim a small portion from the bottom of each strawberry so they can stand upright. Place them on a paper towel to dry. Dip the bottom of each strawberry into the melted chocolate and then roll them in the crushed peanuts. Put the chocolate-coated strawberries on a parchment-lined tray and refrigerate while you prepare the filling.
  4. In a large bowl, beat the cream cheese until it's smooth (around 2 minutes). Add the peanut butter, vanilla extract, and powdered sugar. Keep beating until the mixture is well combined and smooth. Adjust the amounts of powdered sugar and peanut butter to your taste preference.
  5. Fill a piping bag with the peanut butter cheesecake mixture using the RFAQK icing star tip. If you don't have a piping bag, a resealable bag with a corner cut-off will work. Fill each strawberry with the peanut butter cheesecake mixture.
  6. Sprinkle festive decorative sprinkles or additional crushed peanuts on top of the filled strawberries.
  7. Arrange the completed strawberries on a serving tray and refrigerate them until you're ready to serve.

Enjoy your delicious Peanut Butter Cheesecake Stuffed Strawberries!


As we come to the end of our peanut butter cake filling guide, remember that baking isn't just about making treats; it's about making smiles and warmth. With these tips, your cakes will be like hugs on a plate. So go ahead, whip up those peanut butter dreams. And let the joy of sharing your creations fill the air. Happy baking!

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