Recipe by Greeny4444
This is my father-in-law's mother's cake recipe from Oklahoma, and I'm posting it for safe keeping. Word (word in our family, that is) has it that no one made a mayonnaise cake like she did. She would always send one back with my husband's family when they made a trip out to Oklahoma to visit from Colorado. The frosting she put on it was boiled sugar frosting, and my father-in-law's father apparently liked frosting so much it was like, "How about a little cake with your frosting?" That's what I've heard anyway. ;) I've tried to make the boiled sugar frosting a couple times, but it doesn't come out right (maybe it's the Colorado altitude, maybe it's my cooking skills, maybe it was a grandma thing [she did have 50 years of making it behind her]. Who knows.), but my husband - the grandchild that loves mayonnaise cake the most out of all of them, so much so that we were gifted the "mayonnaise cake pan" upon the grandmother's passing - likes it just as much with this chocolate frosting. The frosting recipe is adapted from Hershey's and works swimmingly, whether you're a grandma or not. ;) Oh, this cake is also great when it's chilled - it makes it more dense and SO good.
For the cake
- 1 1⁄4 cups sugar
- 3 tablespoons cocoa, heaping
- 1 cup mayonnaise (Hellman's is a good kind)
- 2 cups flour
- 1 1⁄4 teaspoons baking soda, plus 1/8-1/4 teaspoon baking soda
- 1 cup cool water, plus 2-3 tablespoons cool water
- 1⁄4 teaspoon salt
- 1 teaspoon vanilla extract
For the frosting
- 1 1⁄3 cups powdered sugar
- 2 tablespoons cocoa
- 3 tablespoons butter
- 2 tablespoons milk
- 1⁄4 teaspoon vanilla extract
Directions See How It's Made
- For the cake: Preheat the oven to 350 degrees F and lightly grease a 9x12 baking pan.
- Mix all ingredients in a medium bowl until you can't see any more flour.
- Pour into the prepared baking pan and bake for 30 minutes.
- Let the cake cool completely in the pan on a wire rack.
- For the frosting: Place powdered sugar and cocoa in a medium bowl (I usually use a 4-cup Pyrex mesuring cup).
- Heat butter and milk in a small microwave-safe bowl in the microwave until the butter is melted (be careful - if the heat is too high, it'll splatter!).
- Gradually beat the butter mixture into the cocoa mixture until smooth.
- Stir in vanilla.
- Spread the warm frosting over the cooled cake. The frosting makes about a cup or so.