In another large bowl, add flour, brown sugar, cinnamon, salt and oats.
¾ cup flour, 1 cup old fashioned oats, ⅔ cup light brown sugar, 1 tablespoon ground cinnamon, 1 teaspoon kosher salt
Now add your chilled diced butter to the bowl and cut in the butter with a pastry cutter, a fork and knife or by rubbing the flour mixture and butter in your hands until it is the size of peas then set aside.
½ cup unsalted butter cubed and chilled
Place your ramekins or baking dish on to a sheet pan in case the berry juice bubbles over the side.
Evenly distribute your berries to your baking dish.
Now evenly spread this mixture over top of your berries.
Bake for about 45 minutes to 1 hour or until the berry juice is nice and bubbly and the top turns a light golden brown.
Let rest for 5 minutes.
Serve warm with whipped cream or ice cream.
Notes
To make individual crisps ahead of time:Just assemble the crisp ingredients in a large bowl and keep in the refrigerator until you are ready to assemble. When you are ready to bake it, just evenly distribute your frozen berries into containers and then evenly distribute crumble topping over top. Bake as instructed and enjoy.Storing the Crisps:The mixed berry crisp can be stored in the refrigerator for up to 5 days. To re-heat, remove the crisp from the fridge and allow to come to room temperature. Place aluminum foil over the top of the crisp, place on a baking sheet and bake in a 350 degree oven for 15 minutes or until the juices begin bubbling.