Peanut Butter Cake Bars

Friday, July 31, 2020
Peanut Butter Cake Bars are an easy throw-together recipe great to take on trips, potlucks, picnics, and something mom would make when we had lots of peanut butter in the house to get rid of.

It's an easy recipe for kids to help make and they really love them.

Of course for those with peanut allergies, you can always substitute sunflower or sesame seed butter like Tahini and add some peanut butter nut free flavoring that has no peanuts in it.

There are several choices and recipes for topping these delicious bars also.

We love them with raspberry jello or a peanut butter frosting as shown.

The best part about this recipe is it's all done in one bowl and is a quick peanut butter dessert.

Perfect for school lunches unfrosted as a quick little pick me up!

If you love peanut butter recipes, you may want to also try my favorite Peanut Butter Graham Brownie Bars, also.

Take a look at this easily printable recipe below.

this is a peanut butter bar cake with peanut butter frosting

Easy Cake Recipes

We just love easy cake recipes like this one, we have several quick recipes using cake mixes also you may want to try.

I also have some recipes using doctored cake mixes you may like to try, Peanut Butter Texas Sheet Cake Mix Cake, Banana Cake Mix Cake, and Sour Cream Coffee Cake Mix Cupcakes are all easy favorites!

If you're not fond of baking, you may want to try those easy recipes.

this is peanut butter frosting in a glass bowl with a spatula

Ingredients You Will Need:

  • butter
  • sugar
  • eggs
  • vanilla
  • flour
  • baking powder
  • water
  • whole milk
  • creamy peanut butter

this is the batter for a scratch peanut butter cake

More Peanut Butter Recipes You May Like

Girl Scout Peanut Butter Cookie Recipes

No-Bake Buckeye Bars

Peanut Butter Chocolate Chip Cookies

Keto Peanut Butter Cookies

Pin for later

this is how to make peanut butter bars in a sheet cake pan pin for later

Bar Cakes

If you're looking for a versatile Peanut Butter Cake Bar cake, this is it.

Just by changing the toppings, you will have a different cake every time.

This cake is great plain with just a light dusting of powdered sugar and a great little dessert!

peanut butter cake bars, bar cookies, cake bars, peanut butter recipes
bars, cookies, cake recipes, peanut butter recipes
Yield: 24
Author: Claudia Lamascolo
Peanut Butter Cake Bars

Peanut Butter Cake Bars

Prep time: 10 MCook time: 25 MTotal time: 35 M
If you want a quick homemade from scratch delicious peanut butter bar this is it. The cake is moist and delicious, easy to make and there are several topping options including jellies and frosting ideas.


  • 1 cup butter
  • 2 cups of sugar
  • 2 eggs
  • 1 teaspoon vanilla
  • 2 cups flour
  • 1 teaspoon baking powder
  • 1 cup of water
  • 1/2 whole milk
  • 1 cup creamy peanut butter


  1. Cream butter sugar and peanut butter until fluffy.
  2. Add eggs and vanilla.
  3. Stir in the dry ingredients beating until well combined with milk and water.
  4. Bake in a greased 13x9 pan at 350 degrees until toothpick comes clean in the center, around 45 minutes or 25 minutes in a brownie pan ( do the toothpick test in the middle to see if it comes out clean).
  5. Frosting and Topping Options:
  6. Spread with jelly of your choice.
  7. Frost with vanilla, peanut butter, or chocolate frosting homemade or canned.
  8. Homemade Peanut Butter Frosting for the top:
  9. 3/4 cup peanut butter I use crunchy
  10. 3 tablespoon softened butter
  11. 3 1/2 cups (or to 3/4 cups) powdered sugar
  12. 6 tablespoons or more of whole milk
  13. Beat together until smooth and easy to spread consistency.
  14. Vanilla Frosting:
  15. 1/2 cup butter, with salt
  16. 1 1/2 teaspoons pure vanilla extract
  17. 2 cups powdered sugar
  18. 2 tablespoons milk
  19. Beat together until smooth.
  20. Chocolate Frosting:
  21. 1 cup softened butter
  22. 1/3 cup whole milk
  23. 1 1/2 teaspoon vanilla
  24. 1/2 teaspoon sea salt
  25. 2/3 cup cocoa powder sifted
  26. 3 cups powdered sugar sifted
  27. Beat together until smooth.
  28. Ganache: Heat in a glass bowl 1/2 cup of heavy cream until it boils, add 8 ounces of good grade chocolate into the heavy cream, and let it sit 2 minutes. Stir until blended evenly and pour over peanut butter bars.
  29. Garnish Options: chopped peanuts for garnish or mini chocolate chips, crushed cookie crumbs or peanut butter chips
Created using The Recipes Generator

Pin for later

More Bar Cakes We Love

Banana Streusel Bars

Raspberry Oatmeal Bars

Blueberry Crumble Bars

Disclosure: This recipe was originally shared in 2015. It was edited and re-published in 2020.


  1. Claudia,
    You did put an any peanut butter in the ingredients for the bars, yet you stated to mix the butter, sugar, and peanut butter.

  2. thank you Diane that will teach me to post when I worked a 15 hour day! thank you for that heads up ...

  3. These look incredible! I might have to skip the frosting though :(

  4. Oh my this sounds heavenly. It's not a low cal dish but sometimes it's okay to indulge.


Remember to use the search option for a recipe you're looking for and thanks for all your kind words and support. We love our readers all the best Claudia