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Old fashioned oatmeal cake recipe 2025 12 09 151358 150x150

Old Fashioned Oatmeal Cake

A delightful dessert that is moist and flavorful, topped with a delicious nut and coconut frosting, perfect for any occasion.
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Course Dessert, Snack
Cuisine American
Servings 12 servings
Calories 320 kcal

Ingredients
  

For the Cake

  • 1 cup quick oats 89 grams
  • ½ cup unsalted butter 113 grams, room temperature, or 1 stick
  • cups water 284 grams, boiling at 212°F
  • 1⅓ cups all-purpose flour 160 grams
  • 1 teaspoon baking soda 6 grams
  • 1 teaspoon kosher salt 3 grams
  • ¼ teaspoon freshly grated nutmeg
  • 1 teaspoon apple pie spice 3 grams
  • 1 teaspoon ground cinnamon 3 grams
  • 1 cup granulated sugar 200 grams
  • 1 cup dark brown sugar 213 grams
  • 2 large eggs 100 grams, room temperature and lightly beaten

For the Frosting

  • 6 tablespoons unsalted butter 85 grams, or ¾ stick
  • ¼ cup heavy cream 57 grams
  • ½ cup granulated sugar 100 grams
  • ¼ teaspoon kosher salt
  • ½ cup sweetened shredded coconut 43 grams, toasted
  • 1 cup chopped pecans 114 grams, toasted
  • 1 teaspoon pure vanilla extract 4 grams
  • 1 tablespoon freshly squeezed lemon juice 14 grams, from ½ lemon

Instructions
 

Preparation

  • Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.
  • In a bowl, combine the quick oats and boiling water. Let it sit until the oats absorb the water.
  • In another bowl, cream together the ½ cup room temperature butter, granulated sugar, and brown sugar.
  • Add the eggs to the sugar mixture and mix well.
  • In a separate bowl, mix together the flour, baking soda, salt, nutmeg, apple pie spice, and cinnamon.
  • Gradually add the dry ingredients to the wet mixture, alternating with the soaked oats. Mix until combined.
  • Pour the batter into the prepared baking dish and bake for about 30-35 minutes or until a toothpick comes out clean.

Frosting Preparation

  • While the cake bakes, prepare the frosting. In a saucepan, melt the 6 tablespoons of butter.
  • Stir in the heavy cream, ½ cup granulated sugar, and ¼ teaspoon salt. Bring to a boil and let it bubble for 2 minutes.
  • Remove from heat and stir in the toasted coconut, pecans, vanilla extract, and lemon juice.
  • Once the cake cools, spread the frosting evenly on top.

Notes

Serve Old Fashioned Oatmeal Cake warm or at room temperature. Pairs well with coffee or tea.
Keyword Baking, Dessert Recipes, Nut and Coconut Frosting, Oatmeal Cake, Old Fashioned Cake