Old Farmer's Almanac Peanut Butter Sheet Cake Recipe

This decadent peanut butter sheet cake recipe, winner of second place in a prestigious peanut butter recipe contest, will be the star of your next gathering! Rich, moist cake layered with a creamy, dreamy peanut butter marshmallow frosting – it's pure peanut butter heaven. Easy to make and perfect for sharing (or not!). Get ready to experience the taste of victory!

Prep Time 20 mins
Cook Time 50 mins
Calories 250.1 kcal
Protein 7g
Rating 5.0 (1 Reviews)
Old Farmer's Almanac Peanut Butter Sheet Cake 12

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Recipe Author

Chef Forktionary, author of this recipe

Recipe adapted from Food.com. Standardized by Forktionary.

Ingredients for Old Farmer's Almanac Peanut Butter Sheet Cake

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How to Make Old Farmer's Almanac Peanut Butter Sheet Cake

  1. **Cake:** Preheat oven to 350°F (175°C). Grease and flour a 15x11x1-inch baking pan.
  2. In a large bowl, whisk together the flour, baking soda, sugar, and salt.
  3. In a medium saucepan, combine the oil, margarine, peanut butter, and 1 cup of water. Heat over medium heat, stirring constantly, until just simmering. Do not boil.
  4. Pour the warm peanut butter mixture over the dry ingredients. Mix until just combined.
  5. Add the eggs, vanilla extract, and buttermilk. Mix until smooth.
  6. Pour batter into the prepared pan and spread evenly.
  7. Bake for 15-18 minutes, or until a wooden skewer inserted into the center comes out clean.
  8. **Icing:** While the cake is baking, prepare the icing. In a medium saucepan, combine the evaporated milk, sugar, and margarine.
  9. Bring to a gentle boil over medium heat, stirring constantly. Cook for 2 minutes.
  10. Remove from heat and stir in the peanut butter and marshmallows until melted and smooth.
  11. Stir in the vanilla extract.
  12. Pour the warm icing over the warm cake and spread evenly.
  13. Let the cake cool completely before cutting and serving.

Nutrition Information (Approximate per serving)

Sodium

8 g

Sugar

85g

Fat

11g

Carbs

9g