Preheat oven to 350 degrees. Combine the blueberries, sugar and flour, and toss to mix. Put in a buttered shallow baking dish (pie pan or 8×8 brownie pan). To make topping, combine flour, sugar and butter and mix until it looks like course crumbs. Add oats and cinnamon and mix a little more. Spread topping evenly over fruit and pat down gently with your fingertips. Bake until the top is light brown and crisp, about 35-40 minutes. Serve warm with ice cream (this part is not optional).
Adapted from In a Shaker Kitchen: 100 Recipes From the Shaker Tradition by Norma MacMillan
You can easily assemble the topping or the whole crisp in advance. Cover tightly and place in the freezer until you are ready to bake. That makes one less thing to worry about when you’re entertaining!
Make it vegan:
Fruit crisps are one of the easiest desserts to make vegan. Simply substitute the butter for your favorite vegan butter (I especially love using Miyoko's vegan butter, which is available at most major grocery stores). Serve with non-dairy ice cream.
Can I use frozen blueberries?
Yes, absolutely. This can come in handy when blueberries are not in season.