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Baked Berry Oat Crumble

This Baked Berry Oat Crumble is a cozy, naturally sweet dish that works beautifully as either a healthy breakfast or an easy dessert. Juicy blueberries and blackberries bake down into a warm, jammy base while a golden oat topping adds just the right amount of crunch.
Finished with creamy vanilla yogurt, this feels indulgent yet nourishing — perfect for meal prep mornings, weekend brunch, or when you’re craving something sweet without going overboard.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 8 servings
Course: Breakfast, Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

Berry Base
  • 18 oz blueberries
  • 12 oz blackberries chopped
  • ¼ c coconut sugar
  • 1 tsp vanilla extract
  • 1 tsp lemon juice
Oat Crumble Topping
  • 1 c rolled oats
  • ¼ c coconut sugar
  • ½ c oat flour
  • 1 tbsp ground flaxseed
  • 1 tsp vanilla extract
  • ½ tsp cinnamon
  • ⅛ tsp salt
  • ¼ c butter melted
For Serving
  • Vanilla yogurt or ice cream for dessert

Method
 

Preheat the oven
  1. Preheat oven to 350°F and lightly grease a baking dish.
Prepare the berry layer
  1. In a large bowl, combine blueberries, blackberries, coconut sugar, vanilla extract, and lemon juice. Spread evenly in the bottom of the baking dish.
Make the oat crumble
  1. In another bowl, mix together rolled oats, coconut sugar, oat flour, flaxseed, vanilla extract, cinnamon, and salt. Pour in melted butter and stir until everything is evenly coated and crumbly.
Assemble
  1. Sprinkle the oat mixture evenly over the berries.
Bake
  1. Bake for 30 minutes, or until the topping is lightly golden and the berries are bubbling around the edges.
Cool & serve
  1. Let cool slightly before serving.
  2. Spoon warm crumble into bowls and top with vanilla yogurt for a comforting breakfast, or enjoy as a dessert with ice cream.

Notes

  • This is perfect for meal prep — store in airtight containers in the fridge for up to 4 days.
  • Reheat gently in the microwave or oven.
  • Delicious served warm or cold with yogurt.
  • You can swap in any berries you have on hand.