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Freshly baked homemade blackberry oatmeal bars recipe on parchment with crumbly oat topping and juicy blackberry filling.

Blackberry Oatmeal Bars Recipe

These blackberry oatmeal bars recipe are the perfect combination of juicy berries and a crumbly oat crust. Quick, wholesome, and ideal for breakfast or dessert.
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Prep Time 15 minutes
Cook Time 40 minutes
Cooling Time 2 hours
Total Time 2 hours 55 minutes
Servings: 12 bars
Course: Breakfast, Dessert, Snack
Cuisine: American, Comfort Food
Calories: 215
Ingredients Equipment Method Notes

Ingredients
  

Base Layer & Topping
  • 2 cups Rolled oats Old-fashioned preferred
  • 1.5 cups All-purpose flour For structure
  • 0.75 cup Brown sugar Adds moisture and flavor
  • 0.5 cup Cold butter Cubed
  • 0.5 teaspoon Salt
  • 0.5 teaspoon Vanilla extract
Blackberry Filling
  • 3 cups Blackberries Fresh preferred, frozen thawed OK
  • 0.33 cup Granulated sugar Adjust to taste
  • 2 tablespoon Cornstarch Thickening agent
  • 1 tablespoon Lemon juice Adds brightness
  • 1 teaspoon Lemon zest For citrus aroma

Equipment

  • 1 8x8-inch baking pan Glass or metal
  • 1 Large mixing bowl For oat crumble and berry mixture
  • 1 Pastry cutter Or use fingers
  • 1 Parchment paper For easy removal
  • 1 Sharp knife For clean slicing

Method
 

  1. Preheat oven to 350°F and line an 8x8 inch pan with parchment.
  2. Mix oats, flour, sugar, salt, butter, and vanilla to make crumble.
  3. Press half of crumble into pan to form base.
  4. Toss blackberries with sugar, cornstarch, lemon juice, and zest.
  5. Spread berry mix over base and top with remaining crumble.
  6. Bake 35–40 minutes until golden and bubbly.
  7. Cool completely for 2 hours before slicing.

Notes

  • Nutrition information is automatically calculated, so should only be used as an approximation.