Preheat oven to 350 degrees.
Butter your cast iron skillet or baking dish. Add 3lbs of fruit in skillet, add jam, vanilla, maple syrup and stir.
Sprinkle cinnamon and arrowroot power, stir until fruit is coated.
In a separate bowl, make topping by combining all dry ingredients. Stir then add butter and 1 1/2 tbsp maple syrup, use pastry cutter, fork or hands to mix well.
Sprinkle topping over berries.
Put crisp in oven, uncovered. Bake for 20 min.
Remove from oven and drizzle with last 1 1/2 tbsp maple syrup and sprinkle about 2 tbsp butter over the crisp, put back in over for 20-25 more minutes.
Remove from oven when berries are bubbling and the crisp topping is starting to brown.
Let sit for at least 5 minutes.
Dish into bowls and top with vanilla ice cream or whipped cream.
Enjoy!