one green planet
one green planet

Super moist peanut butter cake layered with peanut butter fudge filling topped off with a decadent buttercream frosting. If you want to get fancy, make homemade peanut brittle for a garnish and a crisp, crunchy bite to contrast the soft and smooth textures of the cake. It may seem like a pretty grand project but the results are even more grandiose and well worth the effort!

Peanut Butter Fudge Brittle Cake [Vegan]

Save Trees. Print Less. But if you must, we charge $2.99 to encourage less waste

Ingredients You Need for Peanut Butter Fudge Brittle Cake [Vegan]

For the Frosting:

For the Cake:

  • 1 cup and 2 tablespoons vegan butter
  • 2 1/4 cups granulated sugar
  • 1 cup creamy peanut butter
  • 5 tablespoons flax meal
  • 3/4 cup warm water
  • 3 teaspoons vanilla extract
  • 3/4 cup soy milk
  • 1 tablespoon vinegar
  • 2 1/2 cups all-purpose flour
  • 1 1/4 teaspoons baking powder

For the Peanut Butter Fudge:

  • 1 cup peanut butter
  • 1 1/2 cups corn syrup or agave
  • 1/4 cup coconut oil or vegan butter
  • 2 teaspoons vanilla extract

For the Peanut Brittle:

  • 1 cup sugar
  • 1/2 cup corn syrup
  • 1/4 cup water
  • 2 tablespoons vegan butter
  • 1 teaspoon baking soda
  • 1 cup unsalted raw peanuts

For the Ganache Drizzle:

How to Prepare Peanut Butter Fudge Brittle Cake [Vegan]

For the Buttercream:
  1. Prepare buttercream frosting according to recipe directions.
  2. Prepare the chocolate icing as well and reserve until needed.

For the Cake:

  1. Preheat the oven to 350°F and grease and parchment paper 4 7-inch cake pans or 2 8-inch cake pans.
  2. Sift the flour with the baking powder.
  3. Combine the flax meal with the warm water and set aside to thicken about 5 minutes.
  4. Add the vinegar to the soy milk.
  5. Cream the vegan butter with the sugar on medium to high speed until fluffy about 3 minutes.
  6. Add the peanut butter and mix well.
  7. Add the vanilla extract.
  8. Add the flax paste and cream well to combine.
  9. Next add about 1/3 of the flour mixture and mix just until it is incorporated.
  10. Then add about half of the soy milk mixture. Mix to combine.
  11. Add another 1/3 of the flour and then the rest of the milk mixture.
  12. Mix in the last addition of flour.
  13. Divide evenly between the prepared pans and bake for approximately 30 minutes or until they are done.

For the Peanut Brittle:

  1. Combine the peanut butter and agave or corn syrup in a heavy bottom sauce pot and bring to a boil stirring constantly.
  2. Boil for about 1 minute then add the coconut oil and vanilla extract and transfer to a bowl to cool.

For the Peanut Brittle:

  1. Combine the sugar and water in a heavy sauce pot and bring to a boil.
  2. Insert a candy thermometer and boil without stirring until it is 300°F, then add the vegan butter, baking soda, vanilla extract, and peanuts.
  3. Spread mixture on a lightly oiled sheet pan and let cool.

To Assemble the Cake:

  1. In between each cake layer, pipe an outer ring of the vanilla buttercream and then fill the ring with the chocolate frosting before adding the next cake layer on top.
  2. Frost the sides and the top of the cake with the vanilla buttercream.
  3. Add the ganache drizzle around the rim of the top of the cake so it starts to drip down the sides.
  4. Garnish the cake with pieces of the peanut brittle.
Save Trees. Print Less. But if you must, we charge $2.99 to encourage less waste

Report Recipe Issue

Please report any concerns about this recipe below!

Is there an issue with this recipe?

Nutritional Information

Total Calories: 15,798 | Total Carbs: 1,834 g | Total Fat: 860 g | Total Protein: 269 g | Total Sodium: 6,951 g | Total Sugar: 1,320 g

Note: The information shown is based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.

Help keep One Green Planet free and independent! Together we can ensure our platform remains a hub for empowering ideas committed to fighting for a sustainable, healthy, and compassionate world. Please support us in keeping our mission strong.


This site uses Akismet to reduce spam. Learn how your comment data is processed.