Moist Vegan Peanut Butter Cake with Simple Ingredients

These vegan peanut butter cake bars are perfect if you love peanut butter and chocolate. Moist, not overly sweet, simple to make and nourishing, this cake is naturally gluten-free, vegan, refined sugar-free and oil-free.

Peanut butter is one of life’s greatest comforts. I have fond memories of peanut butter sandwiches from childhood: soft white bread, margarine and a generous layer of the sugary, creamy peanut butter. Today I prefer using peanut butter in baking—its flavor and texture elevate so many recipes.

To celebrate this ingredient, I developed a healthier peanut butter cake that still feels indulgent. This recipe is flourless, producing a tender, moist crumb that many gluten-free cakes lack. It contains no eggs or dairy, and it’s free from refined sugar and oil.

The cake sponge is finished with a simple, healthier chocolate ganache and a peanut butter swirl. If you prefer, you can replace the ganache with a different chocolate frosting.

Why you’ll love this Vegan Peanut Butter Cake

If peanut butter is your thing and you want a rich treat made with better-for-you ingredients, this cake will quickly become a favorite.

• Moist and flavorful: Despite being flourless, the combination of peanut butter, almond meal and oat flour creates a soft, satisfying texture with a warm nutty taste.
• Vegan and gluten-free: This recipe works for both vegan and gluten-free diets, making it a crowd-pleasing dessert for gatherings.
• Healthier ingredients: No eggs, dairy, refined sugar or oil—natural swaps like applesauce, nondairy yogurt and liquid sweetener keep the cake moist and delicious.
• Topping options: The cake pairs beautifully with a simple chocolate ganache or extra peanut butter. You can also fold vegan chocolate chips into the batter for added decadence.

Ingredients and substitutions

The gluten-free peanut butter sponge uses just a handful of pantry-friendly ingredients.

Please see the recipe card below for exact measurements and the full method.

• Apple sauce or mashed banana: Acts as an oil substitute, adding moisture and natural sweetness. Use unsweetened apple sauce.
• Nondairy yoghurt: Choose a thick style such as coconut or Greek-style vegan yogurt. Regular Greek yogurt works if you’re not making the recipe vegan.
• Liquid sweetener: Maple syrup, agave, coconut sugar syrup or date syrup are all good options. Honey is also fine if you’re not vegan.
• Peanut butter: Use smooth peanut butter made from peanuts only. Almond butter works as an alternative.
• Oat flour: Simply blend oats to make your own oat flour if you don’t have any on hand.
• Almond meal (ground almonds): Adds moisture and richness; almond flour can be substituted.
• Baking powder: Use baking powder (do not substitute with baking soda).
• Apple cider vinegar or lemon juice: Reacts with the baking powder to help the cake rise; white vinegar or lime juice can also be used.

For the healthier chocolate ganache you only need:

• Unsweetened cocoa or cacao powder
• Liquid sweetener
• Nondairy milk or water

Equipment

• Mixing bowl (one or two)
• Whisk
• 8-inch square baking tin (see notes for alternatives)
• Baking parchment paper
• Wire cooling rack

Step-by-step process

These cake bars are quick to make and perfect when you want cake without fuss. Follow the simple steps below.

• Step 1: Preheat the oven to 180°C / 350°F (160°C fan) and line an 8-inch square tin with parchment.
• Step 2: Whisk the wet ingredients—apple sauce, nondairy yogurt, liquid sweetener and peanut butter—until smooth. Stiffer peanut butter may take a minute more.
• Step 3: Stir in the dry ingredients: oat flour, almond meal, baking powder and salt. Mix until combined.
• Step 4: Transfer the batter to the prepared tin and spread evenly.
• Step 5: Bake for about 20 minutes. The top should be slightly golden; a skewer inserted should come out mostly clean. If it’s still raw, bake a few minutes longer.
• Step 6: Cool the cake in the tin on a wire rack while you make the ganache.
• Step 7: Whisk cocoa powder, sweetener and nondairy milk or water until smooth, then pour over the cooled cake.
• Step 8: Dollop extra peanut butter on top and swirl with a knife. Chill for at least 30 minutes before slicing with a hot, wet knife.

Baking tips

• Different tin sizes: If you use a larger tin, double the recipe to avoid a very thin cake. With a smaller tin the cake will be thicker and need more baking time. A 7-inch round tin also works.
• Slicing: For neat bars, dip a sharp knife in hot water before each slice and wipe it clean between cuts.

FAQs

What makes this cake batter unique?

This batter combines creamy peanut butter, oat flour and almond meal to deliver an intensely nutty flavor and a tender, moist crumb that melts on the tongue.

Is this cake suitable as a snack?

Yes. These bars are ideal for a satisfying snack—portable, filling and full of peanut butter flavor.

How popular is this recipe with peanut butter lovers?

The strong peanut butter base combined with a chocolate topping makes this a go-to for fans of peanut butter desserts. It’s rich, comforting and easy to make.

How do I make a vegan peanut butter frosting?

Combine creamy peanut butter with powdered sugar (or a powdered sugar alternative) and a splash of nondairy milk until smooth and spreadable. Use after the cake has fully cooled.

How should I prepare the pan?

Grease the pan lightly and line the bottom with parchment paper for easy removal and clean edges.

More healthy cake recipes to try

• Chocolate Orange Fudge Cake
• Healthy Chocolate Cake
• Vegan Blueberry Cake
• Apple and Cinnamon Almond Cake

If you make this recipe, please leave feedback and a rating in the comments of the original post. I’d love to see your photos!