Preheat oven to 350 degrees.

For topping mix all ingredients by hand until everything is incorporated, refrigerate until needed.

Mix blueberries,sugar, lemon juice, and cinnamon.

Pour blueberry mixture into 2 oven safe ramekins.

Dot with cold butter pieces.

Layer topping over all.

Put ramekins onto a baking sheet in case of spills.

Bake for 20 to 25 minutes.

Allow to cool for 10 minutes before serving.

Serve with whipped cream or vanilla ice cream.