Go Back
Old Fashioned Oatmeal Cake with Coconut Pecan Frosting

Old Fashioned Oatmeal Cake with Coconut Pecan Frosting

A moist spiced oatmeal sheet cake topped with a warm coconut and pecan frosting.
Prep Time 45 minutes
Cook Time 35 minutes
Total Time 1 hour 20 minutes
Course Dessert
Cuisine American
Servings 12 squares
Calories 465 kcal

Equipment

  • 9x13 inch baking dish
  • Mixing bowls
  • Saucepan
  • Electric mixer

Ingredients
  

Main Ingredients

  • 1 cup quick oats
  • ½ cup unsalted butter room temperature
  • 1 ¼ cup boiling water
  • 1 ⅓ cup all purpose flour
  • 1 tsp baking soda
  • ½ tsp kosher salt
  • ¼ tsp freshly grated nutmeg
  • 1 tsp apple pie spice
  • 1 tsp ground cinnamon
  • 1 cup granulated sugar
  • 1 cup dark brown sugar packed
  • 2 large eggs room temperature, lightly beaten
  • 6 tbsp unsalted butter for the frosting
  • ¼ cup heavy cream
  • ½ cup granulated sugar for the frosting
  • 1 pinch kosher salt for the frosting
  • ½ cup sweetened shredded coconut toasted
  • 1 cup chopped pecans toasted
  • 1 tsp pure vanilla extract
  • 1 tbsp fresh lemon juice from 1/2 lemon

Instructions
 

Cooking

  • Soak the oats. Pour the boiling water over the oats and let them stand 10 minutes. Heat the oven to 350 degrees F and grease a 9x13 inch dish.
  • Cream the sugars. Beat the butter with both sugars until fluffy, then beat in the eggs one at a time.
  • Mix the batter. Whisk the dry ingredients, then fold them into the creamed mixture in two additions with the soaked oats.
  • Bake until golden. Spread in the dish and bake 30 to 35 minutes until a toothpick comes out clean. Cool 30 minutes.
  • Boil the topping. Simmer the butter, cream, sugar, and salt for 2 minutes, then stir in coconut, pecans, vanilla, and lemon juice.
  • Frost and cut. Spread the warm topping over the cooled cake and cut into 12 squares once it sets.

Notes

Substitutions: Use walnuts for pecans and add 1/2 cup raisins to the batter if you like.
Tips: Toast the coconut and pecans and cool the cake before frosting.
Storage: Keep covered at room temperature up to 2 days or refrigerate up to 4 days.
Keyword Coconut Pecan Frosting, Oatmeal Cake, old fashioned oatmeal cake, Sheet Cake, Spiced Oatmeal Cake