Preheat oven to 350 degrees F.
Grease 9" x 9" baking dish.
In large bowl, combine berries and 3 tablespoons four. Gently stir using soft rubber spatula to evenly coat the berries.
Spread the berries and flour mixture evenly into the bottom of prepared baking dish.
In another bowl,add all ingredients, except butter.
Stir well to thoroughly combined.
Cut butter into mixture until it has the consistency of fine gravel, then spread over berry layer.
Bake in oven for 40-45 minutes.
Serve warm, with ice cream