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+ servings
Stack of three plum bars on a white plate.
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4.88 from 8 votes

Plum Oatmeal Bars With Crumble Topping

Plum Oatmeal Bars With Crumble Topping layer a tart plum filling with a crunchy sweet buttery, oat-filled crust seasoned with cinnamon.
Prep Time15 minutes
Cook Time50 minutes
Total Time1 hour 5 minutes
Course: Dessert
Cuisine: American
Servings: 16 bars
Calories: 233kcal

Ingredients

Base/Topping

  • 2 cups old fashioned rolled oats
  • 1 cup all-purpose flour
  • ½ cup granulated white sugar
  • ½ cup brown sugar
  • 1 teaspoon baking powder
  • 1 teaspoon cinnamon
  • ½ teaspoon kosher salt
  • 1 cup melted unsalted butter 2 sticks
  • 1 teaspoon vanilla extract

Plum Filling

  • 6 plums
  • 1 tablespoon cornstarch

Instructions

  • Step 1: Line a 9 x 9-inch baking pan with parchment paper allowing the ends to extend over two of the sides, spray with nonstick spray, and set aside. Heat oven to 375°F (190°C) and position an oven rack at the top of the oven.
  • In a large bowl, stir together the 2 cups old fashioned rolled oats, 1 cup all-purpose flour, ½ cup granulated white sugar, ½ cup brown sugar, 1 teaspoon baking powder, 1 teaspoon cinnamon, and ½ teaspoon kosher salt. Add the 1 cup melted unsalted butter and 1 teaspoon vanilla extract. Stir until crumbly.
  • Press half of the dough into the bottom of your baking pan and bake for 10-12 minutes or until lightly golden brown on the edges.
  • While the crust is baking, chop the 6 plums into 1-inch pieces. Layer the plums over the baked crust and sprinkle with the 1 tablespoon cornstarch. Top with the remaining crust mixture.
  • Bake for 30-40 minutes until the crust is light golden brown.
  • Cool completely then refrigerate for one hour. Use the parchment paper to lift the bars from the pan and cut them into squares.

Notes

Make the crumb base/topping ahead of time and store it in the refrigerator or freezer. You can also double the recipe and keep extra in your freezer for future use.
Substitute a good plum jam in place of the fresh plums.
Baking times for all recipes are only suggestions. The actual baking time will vary depending upon your oven. It is helpful to know your oven and worth purchasing an inexpensive oven thermometer. Oven temperatures can vary as much as 50 degrees plus or minus.
Refrigerating the bars for at least an hour before cutting ensures easy clean cuts.
Substitute your favorite stone fruit like peaches, nectarines, or apricots for the plums.
Storage: Store the plum bars in the refrigerator in an airtight container for up to one week.

Nutrition

Serving: 1 | Calories: 233kcal | Carbohydrates: 29g | Protein: 2g | Fat: 12g | Saturated Fat: 7g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 3g | Trans Fat: 0.5g | Cholesterol: 31mg | Sodium: 104mg | Potassium: 98mg | Fiber: 2g | Sugar: 16g | Vitamin A: 440IU | Vitamin C: 2mg | Calcium: 33mg | Iron: 1mg