Heat oven to 375ºF. Spray bottom only of 8-inch square pan with cooking spray.
In large bowl, toss apples, sugars, 1/2 cup schnapps and the cinnamon. Spread evenly in pan.
In small bowl, mix cookie dough and granola until crumbly. Spread over apples.
Bake 40 minutes.
In chilled small bowl, beat topping ingredients with electric mixer on high speed until stiff peaks form.
To serve, spoon apple crisp into small drinking glasses. Top each with whipped cream and if desired, sprinkle with additional granola. Serve immediately.