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A square slice of Grandma's banana cake on a plate.
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4.75 from 4 votes

Grandma's Banana Cake

Grandma's banana cake recipe is homemade from scratch with ingredients you more than likely have in your pantry. A simple dusting of confectioners' sugar finishes it off.
Prep Time15 minutes
Cook Time25 minutes
Total Time40 minutes
Course: Desserts and Sweets
Cuisine: American
Servings: 9

Equipment

Ingredients

  • cup butter softened
  • ¾ cup packed brown sugar
  • 1 teaspoon pure vanilla extract
  • 1 egg
  • 2 very ripe bananas mashed
  • 1 ½ cups cake flour see note on how to substitute if you don't have any!
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • 2 tablespoons sour milk see notes
  • Confectioners' sugar for dusting cooled banana cake

Instructions

  • Preheat oven to 350°F.  Spray an 8-inch square pan with non-stick cooking spray with flour, like Baker's Joy.
  • In a bowl whisk together flour, baking powder, baking soda, and salt.
  • In a second bowl beat together butter, sugar, and vanilla extract, until light and fluffy (approximately 3 - 5 minutes). Then add the egg and the mashed bananas beating to mix.
  • To the butter mixture, add the dry ingredients alternately with the sour milk, starting on low, beat until incorporated, then beat on medium-high until smooth.
  • Pour into the prepared pan and bake for approximately 30-35 minutes or until a cake tester comes out clean.
  • Let cool completely before dusting with confectioners' sugar.

Notes

To make a cake flour substitute: For 1 1/2 cups of cake flour measure 1 1/2 cups of all-purpose flour and remove 3 tablespoons. Place in a bowl. Add 3 tablespoons of cornstarch. Using a wire whisk, stir to combine and fluff. It's ready to use.
To make sour milk: In a ramekin or other small bowl, mix together 2 tablespoons 2% milk and 1/4 teaspoon of lemon juice. Let stand for 10 minutes.
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