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Slice of moist oatmeal cake recipe with coconut-pecan topping on floral plate

Old-Fashioned Oatmeal Cake

This moist and nostalgic oatmeal cake recipe is packed with hearty oats, warm spices, and topped with a rich coconut topping. It’s easy to make, perfect for gatherings, and even better the next day.
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Course: Dessert
Cuisine: American, Vintage
Prep Time: 20 minutes
Cook Time: 35 minutes
Topping Bake Time: 15 minutes
Total Time: 1 hour 10 minutes
Servings: 12 Slices
Calories: 350kcal
Cost: $7–9

Equipment

  • 1 9x13-inch metal baking pan Recommended over glass for even baking
  • 1 Stand mixer or hand mixer For creaming butter and sugars
  • 1 Medium mixing bowls For oats and topping
  • 1 Measuring cups and spoons
  • 1 Rubber spatula For folding and spreading topping

Ingredients

  • 1 cup Rolled oats Use old-fashioned oats
  • 1.25 cups Boiling water To soak oats
  • 0.5 cup Butter Softened
  • 0.75 cup Granulated sugar
  • 0.75 cup Brown sugar
  • 2 Eggs
  • 1.33 cups All-purpose flour
  • 1 teaspoon Baking soda
  • 1 teaspoon Ground cinnamon
  • 0.5 teaspoon Salt
  • 1 teaspoon Vanilla extract
  • 0.5 cup Brown sugar (for topping)
  • 0.25 cup Butter (for topping) Melted
  • 0.75 cup Flaked coconut
  • 0.5 cup Chopped walnuts or pecans Optional
  • 2 tablespoons Heavy cream or evaporated milk

Instructions

  • Soak the rolled oats in boiling water for 20 min
  • Preheat oven to 350°F and grease 9x13 pan
  • Cream butter, granulated sugar, and brown sugar
  • Add eggs and vanilla to the creamed mixture
  • Mix flour, baking soda, cinnamon, and salt
  • Combine dry ingredients and soaked oats with wet
  • Pour batter into pan and spread evenly
  • Bake for 30–35 min until toothpick comes out clean
  • Mix topping: melted butter, brown sugar, coconut, nuts, and cream
  • Spread topping on hot cake and bake 10–15 min more
  • Cool before slicing and serving

Notes

Let the cake rest before serving for best texture. Great for next-day leftovers too!

Nutrition

Serving: 120g | Calories: 350kcal | Carbohydrates: 45g | Protein: 4g | Fat: 18g | Saturated Fat: 10g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 5g | Cholesterol: 50mg | Sodium: 240mg | Potassium: 110mg | Fiber: 3g | Sugar: 28g | Vitamin A: 300IU | Calcium: 60mg | Iron: 1.5mg