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Homemade Oatmeal Cake slice with oats, toasted coconut, glaze, and caramel drizzle on a wooden plate.

Oatmeal Cake

An old-fashioned oatmeal cake with a moist, tender crumb and a golden coconut topping. A cozy, one-bowl dessert that fills the house with cinnamon warmth.
5 from 1 vote
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Course: Dessert
Cuisine: American
Keyword: 3 ingredient oatmeal cake, Iced Oatmeal cake, Oatmeal Cake, Oatmeal cake recipe healthy, Oatmeal cake recipe without flour, Oatmeal cake vegan, Oatmeal cakes recipe, Pioneer Woman Oatmeal Cake
Prep Time: 20 minutes
Cook Time: 40 minutes
Soaking Oats: 20 minutes
Total Time: 1 hour 20 minutes
Servings: 12
Calories: 350kcal
Cost: $9

Equipment

  • Large mixing bowl (for soaking oats and mixing batter)
  • 9x13-inch baking pan (greased)
  • Measuring cups and spoons (standard set)
  • Small saucepan (for coconut topping)
  • Wooden spoon or spatula (for mixing)

Ingredients

  • 1 cup Old-fashioned rolled oats
  • 1 ¼ cup Boiling water
  • ½ cup Butter, softened - For cake batter
  • 1 cup Brown sugar
  • 1 cup Granulated sugar
  • 2 Large eggs
  • 1 ½ cup All-purpose flour
  • 1 teaspoon Baking soda
  • 1 teaspoon Ground cinnamon
  • ½ teaspoon Salt
  • 1 teaspoon Vanilla extract
  • ½ cup Butter - For coconut topping
  • 1 cup Brown sugar - For coconut topping
  • 2 tablespoon Heavy cream or milk
  • 1 cup Sweetened shredded coconut
  • ½ cup Chopped pecans or walnuts - Optional, adds crunch

Instructions

  • Pour boiling water over oats in a large bowl. Stir and let sit for 20 minutes until plump and soft. Preheat oven to 350°F. Grease 9x13 pan.
  • Stir softened butter into soaked oats until melted. Mix in both sugars. Beat in eggs one at a time, then add vanilla.
  • In a separate bowl, whisk flour, baking soda, cinnamon, and salt. Gently fold into oat mixture until just combined.
  • Pour batter into pan. Bake 35–40 minutes until a toothpick comes out clean. Remove from oven but keep oven on.
  • While cake bakes, melt butter in saucepan. Stir in brown sugar, cream, coconut, and nuts until combined.
  • Spread topping over hot cake. Broil 2–3 minutes until golden and bubbly.

Notes

Nutrition information is automatically calculated and should be considered an approximation. Actual values may vary based on specific ingredients used and portion sizes

Nutrition

Serving: 100g | Calories: 350kcal | Carbohydrates: 48g | Protein: 4g | Fat: 16g | Saturated Fat: 9g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Cholesterol: 55mg | Sodium: 220mg | Potassium: 160mg | Fiber: 3g | Sugar: 32g | Vitamin A: 450IU | Calcium: 40mg | Iron: 1.5mg