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A large piece of Oatmeal Cake on a white plate topped with whipped cream and strawberries.

Oatmeal Cake

Course: Dessert
Cuisine: American
Keyword: grandma's oatmeal cake, old fashioned oatmeal cake
Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes
Servings: 15
Calories: 428 kcal
Author: Malinda Linnebur

This Old Fashioned Oatmeal Cake is an easy and quick cake to make! It's a moist made from scratch cake topped with a caramelized coconut nut topping.



  • cup (300ml) boiling water
  • 1 cup (95g) quick cooking oats (can also use old fashioned)
  • cups (275g) packed brown sugar
  • ½ cup (113g) softened butter
  • 1 teaspoon vanilla
  • 2 large eggs
  • cups (210g) all purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon cinnamon
  • ¼ teaspoon nutmeg, optional
  • ½ teaspoon salt


  • ½ cup (113g) butter
  • ½ cup (120ml) heavy cream
  • 2 cups (120g) flaked coconut (sweetened or unsweetened are fine)
  • 1 cup (190g) packed brown sugar
  • 1 cup (120g) your favorite chopped nuts



  1. Preheat oven to 350° F. Grease a 9x13'' pan with non-stick cooking spray. In a medium bowl add oatmeal and boiling water and set aside for at least 5 minutes to soften. In a mixing bowl cream the butter and brown sugar.

  2. Add the eggs and vanilla and mix just until combined. Stir in the oatmeal mixture. Add the flour, baking soda, cinnamon, nutmeg, and salt. Mix just until combined. Pour into prepared pan and bake for 30-35 minutes or until a toothpick inserted in the center comes out clean.


  1. While the cake is baking prepare the frosting. In a small saucepan heat the butter and cream until butter melts. Stir in the coconut, brown sugar, and nuts. Remove from heat and spread over a hot baked cake. Place under the broiler until lightly golden. Watch closely so it doesn't burn.

Recipe Notes

  1. MAKE AHEAD: This cake can be made up to 3 days in advance. I think this cake tastes best on the second day.
  2. FREEZER FRIENDLY: Cool cake completely. Store in a freezer safe container and freeze for up to 2 months. Thaw overnight at room temperature. 
  3. STORAGE: Store at room temperature for up to 3 days or in the refrigerator for up to 5 days. 
Nutrition Facts
Oatmeal Cake
Amount Per Serving
Calories 428 Calories from Fat 207
% Daily Value*
Fat 23g35%
Saturated Fat 12g75%
Trans Fat 1g
Cholesterol 67mg22%
Sodium 243mg11%
Potassium 180mg5%
Carbohydrates 52g17%
Fiber 2.5g10%
Sugar 36g40%
Protein 5g10%
Calcium 52mg5%
Iron 4mg22%
* Percent Daily Values are based on a 2000 calorie diet. Since different brands of ingredients have different nutritional information, the information shown is just an estimate.