• Preheat oven to 350F. Line an 8x8 inch pan with aluminum foil and spray.

Crust & Crumble Topping

• Mix together melted butter, flour, oats, and sugars until well combined, Mixture will be dry with some larger, well-formed crumble pieces.
• Set 1 heaping cup of mixture aside to be used as crumble topping later.
• Pour remaining mixture into prepared pan and pack to create a smooth, flat crust. Set aside.

Berry Layer

• In a large bowl add all ingredients and toss to combine.
• Evenly distribute berry mixture over crust in pan.
• Evenly sprinkle with the heaping cup crumble mixture.

Baking the Bars

• Bake for approximately 45-55 minute or until edges and center are set. If using frozen berries, baking time will be closer to 55 minutes. Monitor carefully to determine doneness.
• Set on a wire rack and allow to cool for at least 30 minutes before cutting or they will fall apart.