Plums often get lost in all the summer fruit excitement, but do yourself a favor and don’t forget them this year. These delightful bars put plums to delicious use by layering them on top of a buttery, oat-filled crust seasoned with cinnamon. They are just the right amount of sweet and are sure to be a new summer favorite!

Plum Crumble Bars

Prep Time: 20 minutes

Cook Time: 40 minutes

Total Time: 60 minutes

Yield: 24 2-inch bars

Plum Crumble Bars


  • 2 cups all-purpose flour
  • 1 1/2 cups old-fashioned rolled oats
  • 1/2 cup granulated sugar
  • 1/2 cup firmly packed light brown sugar
  • 1 teaspoon vanilla extract
  • 1 teaspoon ground cinnamon
  • 1/2 teaspoon baking powder
  • 1/4 teaspoon salt
  • 3/4 cup (1 1/2 sticks) unsalted butter, cold and cut into 1/2-inch cubes
  • 3 medium plums, pitted and sliced thinly


  1. Preheat oven to 350°F.
  2. Combine flour, oats, sugar, brown sugar, vanilla, cinnamon, baking powder and salt in large bowl. Add butter and mix with pastry blender, fork or your fingers until combined. The mixture will be crumbly, but should hold together when pinched.
  3. Set aside 1 cup of crust mixture.
  4. Transfer remaining crust mixture to 9x13-inch baking pan. Press firmly and evenly into the bottom of the pan.
  5. Bake crust for 10 minutes. Remove from oven.
  6. Layer plums over partially baked crust, overlapping each slice a bit. Sprinkle remaining crust mixture over plums.
  7. Bake 35 to 40 minutes, or until crust is golden brown. Cool completely before cutting into bars.

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7 thoughts on “Plum Crumble Bars

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  1. rehabber said:

    Just 3 plums for a 9×13 that does not sound like much, maybe your plums are a LOT bigger than what I buy.

    • realbutter said:

      That is possible. We recommend that you purchase the amount of plums you think will take to make a thin layer in a 9×13 pan.

    • realbutter said:

      You can use as many plums as you’d like to layer in these bars! The more the merrier. Enjoy!

  2. Yvonne said:

    Can you use Quick cook oats

    • realbutter said:

      Hi Yvonne – You can substitute quick oats in this recipe. Enjoy!

  3. tj said:

    …Hello, I’m making these in the morning, can you please tell me if you’re supposed to grease the pan? Thank you!

    • realbutter said:

      Hello – You can definitely use a little extra butter to grease the pan and make sure the bars come out as easy as possible. Happy baking!