Mayo Cake with Peanut Butter Icing


This is my mom's recipe handed down from her mother. The cake is very moist and light but it's the icing that makes this cake unresistable!

Prep Time:
15 mins
Cook Time:
25 mins
Total Time:
40 mins
16 servings



  • 2 cups all-purpose flour

  • 1 cup white sugar

  • 1 cup mayonnaise

  • 1 cup water

  • ¼ cup unsweetened cocoa powder

  • 2 teaspoons baking soda


  • 1 cup white sugar

  • ½ cup evaporated milk

  • 1 tablespoon margarine

  • ½ cup miniature marshmallows

  • 1 cup peanut butter

  • 1 teaspoon vanilla extract


  1. Preheat oven to 350 degrees F (175 degrees C). Grease a 9-inch baking dish.

  2. Mix flour, 1 cup sugar, mayonnaise, water, cocoa powder, and baking soda together in a bowl until smooth; pour into the prepared baking dish.

  3. Bake in the preheated oven until a toothpick inserted in the center of the cake comes out clean, 20 to 25 minutes.

  4. Stir 1 cup sugar, evaporated milk, and margarine together in a saucepan; bring to a boil and cook for 2 minutes. Remove saucepan from heat, add marshmallows, and stir to melt them completely into the mixture. Stir peanut butter and vanilla extract into marshmallow mixture until icing is smooth; pour over warm cake.

Nutrition Facts (per serving)

373 Calories
21g Fat
43g Carbs
7g Protein
Nutrition Facts
Servings Per Recipe 16
Calories 373
% Daily Value *
Total Fat 21g 26%
Saturated Fat 4g 20%
Cholesterol 8mg 3%
Sodium 329mg 14%
Total Carbohydrate 43g 16%
Dietary Fiber 2g 6%
Total Sugars 28g
Protein 7g
Vitamin C 0mg 1%
Calcium 34mg 3%
Iron 1mg 7%
Potassium 169mg 4%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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