Mixed Berry Crisp 1 Bag Frozen Mixed Berries 1-2 Cups Oats (depending on how much oat mixture you like) Maple Syrup Heat oven to 350. In a bowl, mix oats with enough maple syrup to wet the oats. Fill a large baking dish with berries and top with oat mix. Bake for about 20 min or till topping is brown.