Step 1

Preheat oven to 375°F. Grease an 8-inch square baking dish or 7-inch x 11-inch baking dish.

Step 2

Place the mixed berries into the greased baking dish; sprinkle sugar, corn starch and cinnamon on top and set aside.

Step 3

In a small bowl, combine the oats, flour, brown sugar and salt. Use your hands to combine the cold butter and the dry streusel topping ingredients until mixture resembles coarse crumbs. Sprinkle the crisp/streusel mixture over berry mixture.

Step 4

Bake until the crisp topping is lightly brown, and filling is bubbly, about 35-40 minutes. Serve warm with a scoop of ice cream, if desired.