Blackberry Oatmeal Crumb Bars
My family raves about these Blackberry Oatmeal Crumb Bars! A flaky crust on the bottom, a sweet, fruity middle layer, and a crunchy oatmeal and cinnamon topping. They are a real treat when fresh blackberries are in season. You can eat them for breakfast, lunch or dessert!

I enjoy walking out my back door in the summer and picking fresh blackberries from the bushes growing around my house. Sometimes the blackberries get as big as a cork, sweet and juicy and perfect for recipes like this one. Making recipes with ingredients that are in season will always give you a better tasting, and usually less expensive, dish or dessert.
Finding ways to use these fresh blackberries has always been easy. Add them to breakfast smoothies and desserts like this one for Mixed Berry Pretzel Salad. We literally eat them for every meal of the day! You’re truly going to enjoy this recipe because these crumb bars are just bursting with fresh berry flavor.

Tips for making Blackberry Oatmeal Crumb Bars:
Here are some helpful tips that make this recipe easier.
- Using a food processor to make the crust and the crumb topping saves you from having to wash two bowls. Simply add ingredients and pulse until combined. Let the food processor do the work for you.
- If you prefer to remove some of the seeds from the berries, press half or more of the berries through a food mill. This will give you fewer seeds in your crumb bars.
- Cool the crust for 10 minutes after removing it from the oven. This helps to set the crust before adding the blackberry filling.
- Don’t like blackberries? Use red or black raspberries to make delicious crumb bars.
Blackberry Oatmeal Crumb Bars Recipe
Ingredients:
Crust:
- 1 3/4 cups flour
- 1/4 cup sugar
- 3/4 cup cold butter cubed (1 1/2 sticks)
- pinch of salt
Filling:
- 2 1/2 cups fresh blackberries (or raspberries)
- 1/4 cup sugar
- 1/4 cup water
- 2 tablespoons cornstarch
- 1/2 cup seedless blackberry jam or raspberry jam
Topping:
- 1/2 cup cold butter cubed (1 stick)
- 1/2 cup flour
- 1/2 cup rolled oats
- 1/2 cup brown sugar
- 1 teaspoon cinnamon

How to make Blackberry Oatmeal Crumb Bars?
Step-by-Step Instructions:
- Preheat the oven to 350 degrees Fahrenheit. To make the crust, pulse the flour, butter, sugar and salt in a food processor. Pulse until mixture resembles coarse sand.

- Put the crust mixture in a 13×9-inch baking dish and press evenly over the bottom of the pan. Bake for 20 minutes at 350 degrees until lightly golden brown. Remove from the oven and cool for 10 minutes.

- For the filling, mix the blackberries, sugar, water and cornstarch in a small saucepan over medium heat. Use a potato masher to mash the berries and continue stirring often. Cook on low for 10-15 minutes until thickened.
- Turn off the heat and add the blackberry jam. Stir until combined. Cool for 10 minutes. Pour over the crust and spread evenly.
- Pulse the ingredients for the topping in the food processor until well combined. Sprinkle the topping over the blackberry filling.

- Bake for another 20 minutes until the crumb topping is golden brown. Cool completely and cut into bars. Recipe makes 15 servings.
You can make a glaze by mixing one cup of powdered sugar and a splash of milk in a small bowl until smooth. Drizzle it over the Blackberry Oatmeal Crumb Bars for an extra sweet treat. My family loves these bars and so will yours!

You can make a glaze by mixing one cup of powdered sugar and a splash of milk in a small bowl until smooth. Drizzle it over the Blackberry Oatmeal Crumb Bars for an extra sweet treat. My family loves these bars and so will yours!
For more fruity bars and breakfast cakes, check out these recipes:
- Cranberry Date Bars
- Raspberry Crumble Coffee Cake
- Lemon Bars
- Frosted Banana Bars
- Rhubarb Custard Bars
- Buttermilk Blueberry Breakfast Cake
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Blackberry Oatmeal Crumb Bars
Ingredients
Crust:
- 1 3/4 cups all-purpose flour
- 1/4 cup granulated sugar
- 3/4 cup COLD butter, unsalted and cubed (1 1/2 sticks)
- 1 pinch salt
Filling:
- 2 1/2 cups blackberries, or raspberries
- 1/4 cup granulated sugar
- 1/4 cup water
- 2 tablespoons cornstarch
- 1/2 cup blackberry jam, or raspberry jam, seedless
Topping:
- 1/2 cup COLD butter, unsalted and cubed (1 stick)
- 1/2 cup all-purpose flour
- 1/2 cup quick oats
- 1/2 cup brown sugar
- 1 teaspoon cinnamon
Instructions
- Preheat the oven to 350 degrees Fahrenheit. To make the crust, pulse the flour, butter, sugar and salt in a food processor. Pulse until mixtures resembles coarse sand.
- Put the crust mixture in a 13×9-inch baking dish and press evenly over the bottom of the pan. Bake for 20 minutes at 350 degrees until lightly golden brown. Remove from the oven and cool for 10 minutes.
- For the filling, mix the blackberries, sugar, water and cornstarch in a small saucepan over medium heat. Use a potato masher to mash the berries and continue stirring often. Cook for 10-15 minutes until thickened.
- Turn off the heat and add the blackberry jam. Stir until combined. Cool for 10 minutes. Pour over the crust and spread evenly.
- Pulse the ingredients for the topping in the food processor until well combined. Sprinkle the topping over the blackberry filling.
- Bake for another 20 minutes until the crumb topping is golden brown. Cool completely and cut into bars. Recipe makes 15 servings.
Equipment
- 1 13×9 inch baking dish
- 1 food processor
- 1 medium saucepan
Raveaboutfood
Make these tasty crumb bars on a Friday, so you can enjoy them over the weekend for breakfast, lunch and dessert after dinner. Fruity and delicious!