Spiced Plum Upside-Down Cake with Oats


I was trying to use up our plum harvest and became inspired to try and make a wholesome version of a pineapple upside-down cake using plums.

Prep Time:
30 mins
Cook Time:
50 mins
Additional Time:
20 mins
Total Time:
1 hrs 40 mins
1 9-inch cake


  • 1 cup rolled oats

  • ½ cup boiling water

  • 1 cup brown sugar

  • ½ cup butter, softened

  • ½ cup white sugar

  • 2 eggs, room temperature

  • 1 ½ teaspoons vanilla extract

  • 1 ½ cups whole wheat flour

  • 1 ½ teaspoons baking soda

  • 1 teaspoon ground cinnamon

  • 1 teaspoon ground nutmeg

  • ½ teaspoon sea salt

  • ¼ teaspoon ground allspice

  • 2 tablespoons butter

  • ¼ cup raw sugar

  • ¼ teaspoon ground cinnamon, or more to taste

  • 1 ½ cups diced plums


  1. Preheat the oven to 350 degrees F (175 degrees C).

  2. Combine oats and water in a medium bowl. Let sit for 20 minutes.

  3. Combine brown sugar, 1/2 cup butter, white sugar, eggs, and vanilla extract in a large bowl. Add oatmeal mixture and mix until combined.

  4. Sift flour, baking soda, 1 teaspoon cinnamon, nutmeg, salt, and allspice together in a bowl. Add to oatmeal mixture.

  5. Place 2 tablespoons butter in a 9-inch square baking pan and melt in the preheated oven. Remove from the oven and sprinkle sugar and cinnamon on top. Sprinkle plums evenly over sugar. Pour batter over plums and spread evenly.

  6. Bake in the preheated oven until a toothpick inserted in the center comes out clean, about 50 minutes.

Cook's Notes:

Try this recipe with other fruits; blueberries, strawberries, rhubarb, green apples, pears, etc.

I try to make this recipe as wholesome as possible. I use a 9-grain flour blend, organic sugars, sea salt, and home-grown plums.

Try adding in 1/2 cup cooked whole grains, such as wheat or oat groats to give it a unique texture.

Nutrition Facts (per serving)

280 Calories
11g Fat
43g Carbs
4g Protein
Nutrition Facts
Servings Per Recipe 12
Calories 280
% Daily Value *
Total Fat 11g 14%
Saturated Fat 7g 33%
Cholesterol 56mg 19%
Sodium 317mg 14%
Total Carbohydrate 43g 15%
Dietary Fiber 3g 11%
Total Sugars 26g
Protein 4g
Vitamin C 2mg 10%
Calcium 35mg 3%
Iron 2mg 12%
Potassium 167mg 4%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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