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    Home > Recipes > Dessert

    Easy Peanut Butter Cake

    Published: Mar 14, 2022 · Modified: Oct 7, 2022 · by Jess Smith · Jump to Recipe · 2 Comments · This post may contain affiliate links.

    peanut butter snack cake
    peanut butter snack cake

    Easy Peanut Butter Cake is a tender, moist cake loaded with peanut butter flavor. There’s no softened butter and no mixer needed, so you can make this 8x8 cake in no time at all.

    slices of peanut butter snack cake stacked on a wooden cutting board

    Snacking cakes are the name of the game for busy home cooks who love a quick baking project (*raising my hand*). This is a cake that requires minimal effort to mix up after school or pop in the oven while eating dinner. When it comes to snacking cakes, these chocolate and vanilla versions have long been regulars around here, but today a peanut butter version joins the team!

    peanut butter snack cake cut into slices on a wooden cutting board

    So What, Exactly, Is a Snacking Cake?

    Snacking cakes are the simplest of cakes that are baked in an 8-inch square or round cake pan. They are mixed up in a bowl or two, don’t require a mixer, use pantry staples, and need little more than a dusting of powdered sugar to finish (though frosting is always welcome). These cakes aren’t overly sweet, making them perfect to have with a mug of coffee or tea, as an afternoon pick-me-up, or as an easy dessert.

    I created my first snacking cake recipe back in 2013 (it’s been updated since) and rarely make any other type of cake. This category of baking has really had a moment, and Yossy Arefi even published an entire cookbook on the subject. It’s a great cookbook too!

    stirring peanut butter in a saucepan

    How to Make Peanut Butter Cake

    1. Preheat your oven to 350°F / 177°C.
    2. Get an 8x8 pan ready (parchment paper and nonstick cooking spray will make the cake a breeze to remove from the pan). 
    3. Heat butter, water, and peanut butter together until simmering. 
    4. Whisk together dry ingredients (flour, sugar, and baking soda). 
    5. Combine warm ingredients and dry ingredients. Set aside.
    6. Whisk together egg, sour cream, and vanilla. 
    7. Combine everything in one bowl. 
    8. Bake until just set, 20 to 24 minutes.
    adding peanut butter mixture to flour mixture in a clear glass bowl
    spreading cake mixture in a square baking pan

    I discovered this method for making peanut butter cake via the Pioneer Woman’s Peanut Butter Sheet Cake. And while my version is quite different from hers in all other respects (measurements, steps to combine ingredients, and size of the cake), I am convinced that this method of melting the butter and peanut butter together first is the secret to a moist peanut butter cake that is also very easy to mix.

    I can’t wait for you to try this cake! If you do, share over on Instagram and tag me @inquiringchef. I love seeing what you make!

    baked snack cake on a wooden cutting board

    More 8x8 Snacking Cakes

    • Easy Vanilla Snack Cake
    • Pumpkin Chocolate Chip Snack Cake
    • One-Bowl Chocolate Cake
    • Applesauce Cake

    Favorite Tools

    • Saucepan - A good quality saucepan will help the ingredients to heat evenly. 
    slices of peanut butter snack cake on a wooden cutting board
    a stack of slices of peanut butter cake on a wooden cutting board
    Print Recipe
    4.36 from 14 votes

    Easy Peanut Butter Cake

    Peanut Butter Cake is a tender, moist cake loaded with peanut butter flavor. There’s no softened butter and no mixer needed, so you can make this 8x8 cake in no time at all.
    Prep Time25 mins
    Cook Time22 mins
    Total Time47 mins
    Course: Dessert
    Keyword: easy snack recipe, peanut butter dessert, snack cake
    Servings: 9
    Calories: 239kcal
    Author: Jess Smith via Inquiring Chef
    Cost: $4.00

    Equipment

    • Mixing Bowls
    • Saucepan
    • 8x8 baking pan

    Ingredients

    • 1 stick (8 Tablespoons) Unsalted Butter
    • ½ cup Water
    • ½ cup Creamy Peanut Butter
    • 1 cup All-Purpose Flour
    • 1 cup Sugar
    • 1 teaspoon Baking Soda
    • 1 large Egg
    • ¼ cup Sour Cream (sub plain or Greek yogurt)
    • ½ teaspoon Pure Vanilla Extract
    • Powdered Sugar, for dusting

    Instructions

    • Preheat oven to 350°F / 177°C.
    • Grease an 8x8 cake pan and line it with parchment paper.
    • In a small saucepan over medium-high heat (or in the microwave), heat butter, water, and peanut butter, stirring continuously, until butter is melted and the mixture is simmering.
    • In a mixing bowl, whisk together flour, sugar, and baking soda.
    • Pour boiling liquids over flour mixture and stir until evenly combined. Set aside and allow it to cool slightly.
    • In a small mixing bowl, beat egg. Add sour cream and vanilla and whisk well.
    • Add egg mixture to peanut butter batter and stir just until combined. Pour into cake pan.
    • Bake until cake is set in the middle and a tester inserted comes out clean, 22 to 24 minutes.
    • Let cake cool completely before removing from pan.
    • Dust with powdered sugar just before serving.

    Nutrition

    Calories: 239kcal | Carbohydrates: 36g | Protein: 6g | Fat: 9g | Saturated Fat: 2g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 23mg | Sodium: 201mg | Potassium: 130mg | Fiber: 1g | Sugar: 24g | Vitamin A: 54IU | Vitamin C: 1mg | Calcium: 21mg | Iron: 1mg

    Related

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    Chocolate Whipped Cream Frosting »

    About Jess

    Hi! I'm Jess. I am the recipe creator and photographer behind the 900+ recipes you’ll find on Inquiring Chef. As a mom to three young kids and professional cook, my mission is to make every moment in the kitchen and around the table count. If you’re looking for easy, flavorful, family-approved recipes, you’ve come to the right place! Learn more about me here.

    Reader Interactions

    Comments

    1. Betty Palen

      March 29, 2022 at 9:33 pm

      5 stars
      Oh man sooooo good and easy! Used 1/2 cup brown and an 8oz container of yogurt and it tastes amazing! So moist and great peanut butter flavor! Thanks!

      Reply
      • Jess Smith

        April 02, 2022 at 8:38 am

        So glad you enjoyed it!!

        Reply

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