Preheat oven or toaster oven to 375 degrees.
Make crisp topping: Mix together all the ingredients. I like to cut the butter into the dry ingredients with a pastry cutter. This can be kept in the fridge or freezer for a couple weeks to use as needed. Or use the entire batch on a pan of blueberry crisp.
Place blueberries into a small ramekin and top with crisp topping.
Bake for 15-20 minutes until the blueberries are hot and bubbly and the topping is golden.
Enjoy as is or serve with ice-cream or whipped cream!