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a stack of 3 raspberry oatmeal crumble bars on a black plate.
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5 from 9 votes

Raspberry Oatmeal Crumble Bars

Who can resist the combination of fresh raspberries and a crunchy oat topping? Not me, and I bet not you either once you try these Raspberry Oatmeal Crumble Bars, a simple yet irresistible treat that’s sure to be a hit at any gathering.
Prep Time15 minutes
Cook Time30 minutes
Total Time45 minutes
Course: Breakfast, Brunch, Dessert
Cuisine: American
Keyword: raspberry crumble bars, raspberry oatmeal bars, raspberry oatmeal crumble bars
Servings: 16
Calories: 139kcal

Ingredients

For the Crumble

  • 1 cup old-fashioned rolled oats
  • ¾ cup all-purpose flour
  • ½ cup light brown sugar packed
  • ½ cup unsalted butter chilled and diced
  • ¼ teaspoon baking soda
  • ¼ teaspoon salt

For the Raspberry Filling

  • 2 cups fresh raspberries
  • ¼ cup granulated sugar
  • 2 teaspoons cornstarch
  • 1 tablespoon lemon juice freshly squeezed

Instructions

  • Preheat your oven to 350°F (175°C). Lightly grease a 9-inch square baking pan or line it with parchment paper for easy lifting.
  • In a large mixing bowl, combine the oats, flour, brown sugar, baking soda, and salt. Add the chilled, diced butter and use your fingers or a pastry cutter to work the butter into the oat mixture until it resembles coarse crumbs.
    process shots showing how to make raspberry oatmeal crumble bars.
  • In another bowl, gently mix the raspberries, sugar, cornstarch, and lemon juice until the raspberries are well coated.
    process shots showing how to make raspberry oatmeal crumble bars.
  • Press about two-thirds of the oat mixture into the bottom of your prepared pan to form a firm base. Evenly spread the raspberry mixture over this base, then sprinkle the remaining oat mixture on top.
    process shots showing how to make raspberry oatmeal crumble bars.
  • Pop it in the oven and bake for about 30 minutes, or until the top is golden brown and the raspberry filling is bubbly. Let it cool completely in the pan.
    process shots showing how to make raspberry oatmeal crumble bars.
  • Once cooled, lift out of the pan using the parchment paper (if used), and cut into bars. Delight in the rich raspberry flavor with the earthy texture of oats!
    process shots showing how to make raspberry oatmeal crumble bars.

Notes

  1. If you're using frozen raspberries, there's no need to thaw them first, but consider adding a bit more cornstarch to the filling to account for extra moisture.
  2. These bars store well in an airtight container at room temperature for up to 2 days or in the fridge for up to 5 days. They're also freezer-friendly for up to 3 months.
  3. Feel free to experiment with other berries like blueberries or blackberries for a different twist.
  4. For a gluten-free option, swap the all-purpose flour with a gluten-free blend and use gluten-free oats.
  5. Add a handful of chopped nuts to the crumble mixture for an extra crunch if you like.

Nutrition

Serving: 1serving | Calories: 139kcal | Carbohydrates: 20g | Protein: 2g | Fat: 6g | Saturated Fat: 4g | Polyunsaturated Fat: 0.4g | Monounsaturated Fat: 2g | Trans Fat: 0.2g | Cholesterol: 15mg | Sodium: 57mg | Potassium: 59mg | Fiber: 2g | Sugar: 11g | Vitamin A: 182IU | Vitamin C: 4mg | Calcium: 15mg | Iron: 1mg
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