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Close-up of berry crumble bars, a delicious treat from ultimate dessert recipes, with a crumbly oat topping and berry filling.

Berry Oat Crumble Bars

These berry oat crumble bars are a delightful dessert that balances a chewy oat crust and topping with a sweet berry filling. They are perfect for satisfying a sweet tooth and are easy to make ahead.
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Prep Time 20 minutes
Cook Time 30 minutes
Cooling Time 1 hour
Total Time 1 hour 50 minutes
Servings: 16 bars
Course: Dessert
Ingredients Equipment Method Notes

Ingredients
  

Berry Filling
  • 1.5 Tablespoons cornstarch 12g
  • 1.5 Tablespoons water 23ml
  • 2 cups mixed berries about 300g, fresh or frozen
  • 1/4 cup pure maple syrup 60ml
  • 1 Tablespoon sugar 11g, coconut sugar, brown sugar, or granulated sugar
Crust + Streusel
  • 2.5 cups rolled oats 213g, old-fashioned or quick oats
  • 0.5 teaspoon ground cinnamon
  • 1 cup almond butter 255g
  • 1/4 cup pure maple syrup 60ml
  • 1/4 cup unsweetened applesauce 60g
  • 1/4 cup coconut oil 56g, melted, or melted butter
For Topping
  • 0.5 cup sliced or chopped almonds 64g
  • 1 Tablespoon oats

Equipment

  • food processor
  • saucepan
  • baking pan
  • Parchment paper
  • cooling rack

Method
 

  1. For the berry filling: Whisk cornstarch and water until dissolved. Place cornstarch mixture, berries, maple syrup, and sugar in a saucepan over medium heat. Stir with a spatula, smashing some berries against the pot. Simmer for 2 minutes, stirring constantly. Remove from heat and let cool completely. The mixture will thicken as it cools. You can refrigerate it to speed up cooling.
  2. Preheat oven to 350°F (177°C). Line an 8 or 9-inch square baking pan with parchment paper, leaving an overhang.
  3. For the crust/streusel: Pulse oats in a food processor until slightly broken up. Stir in cinnamon, almond butter, maple syrup, applesauce, and melted coconut oil. The mixture will be thick and wet.
  4. Press about 3/4 of the crust/streusel mixture firmly into the prepared pan. Spread the cooled berry filling evenly over the crust.
  5. For the topping: Mix sliced almonds into the remaining crust/streusel mixture. Sprinkle this mixture evenly over the berry filling. Sprinkle 1 extra tablespoon of oats on top.
  6. Bake for 27-31 minutes, or until the topping is lightly browned. Remove from oven and place pan on a cooling rack. Let bars cool completely. You can refrigerate them to speed up cooling. Lift cooled bars out using the parchment paper overhang and cut into squares.

Notes

Store leftover bars covered in the refrigerator for up to 1 week.

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