Mix together crisp ingredients. Work in the butter with a fork.
Layer half the apples in a microwave safe bowl, mug, or ramekin. Top with half the crisp mixture. Add another layer of apples and then the remaining crisp mixture. Place in the microwave and cook for 3 minutes.
Careful, it will be very hot when removing from the microwave! Serve warm with whipped topping or vanilla ice cream.
Notes
If you want to make in the oven, you can bake in an oven-safe ramekin for 10-12 minutes in a 375-degree oven.
You can add more/less cinnamon and brown sugar to taste.