1. Preheat the Oven:

• Preheat your oven to 350°F (175°C) and line an 8×8-inch baking dish with parchment paper, leaving some overhang for easy removal.

2. Prepare the Crust & Crumble:

• In a large bowl, combine the rolled oats, flour, coconut sugar, baking powder, and a pinch of salt.
• Add the melted coconut oil and vanilla extract to the dry mixture. Stir until it forms a crumbly texture.
• Reserve about 3/4 cup of the mixture for the topping. Press the remaining mixture firmly into the bottom of the prepared baking dish to form the crust.

3. Prepare the Berry Filling:

• In a medium bowl, combine the mixed berries, maple syrup, cornstarch, and lemon juice. Gently toss until the berries are evenly coated.
• Spread the berry mixture evenly over the crust.

4. Add the Crumble Topping:

• Sprinkle the reserved crumble mixture over the berries, making sure to cover the berries evenly.

5. Bake:

• Bake in the preheated oven for 30-35 minutes, or until the top is golden brown and the berry filling is bubbling.
• Remove from the oven and let it cool completely in the baking dish. This helps the bars to set and makes them easier to cut.

6. Cut into Bars:

• Once cooled, use the parchment paper overhang to lift the bars out of the dish. Cut into squares or rectangles.

7. Serve or Store:

• Pack the bars into your kids’ lunch boxes or store them in an airtight container. They can be kept at room temperature for up to 2 days or refrigerated for up to a week.