First, preheat your oven to 350F. Then, in a large bowl (or directly in the baking dish) add all of the berry filling ingredients and stir until combined. It will look like there's too much flour/dry ingredients but trust the process! Transfer the berry filling to your 8x8" baking dish.
24 oz frozen berries, ¼ cup gluten free 1-to-1 flour, 3 tbsp cane sugar, ½ tbsp lemon juice, 1 tsp vanilla extract, ¼ tsp kosher salt
In another medium bowl, mix together the gluten free flour, oats, brown sugar, cane sugar, cinnamon, and salt. Then, add in the cubed butter and use your hands to incorporate it into the dry ingredients, until the texture resembles coarse crumbs.
½ cup gluten free 1-to-1 flour, ½ cup gluten free rolled oats, 3 tbsp packed brown sugar, 2 tbsp cane sugar, ½ tsp cinnamon, ¼ tsp kosher salt, ½ cup unsalted butter
Sprinkle the crisp mixture evenly over the top of the berry filling. Transfer to the oven to bake for about 1 hour, or until the filling is bubbly and the crisp is slightly golden. Optionally, switch to broil for a few additional minutes.
Allow the berry crisp to cool for at least 10 minutes, then serve alongside some vanilla bean ice cream and enjoy!
vanilla bean ice cream