Crock Pot Apple Crisp is a comforting fall dessert, made with Granny Smith apples, cinnamon, nutmeg, and brown sugar. It’s warm and cozy, and will make your whole house smell like fresh apples and cinnamon. This warm cinnamon crisp with an apple filling is one of our favorite slow cooker recipes. The cinnamon apples are soft and cooked to perfection, with a crisp topping of oats, cinnamon, and sugar. Serve the apple crisp with vanilla ice cream, or even enjoy it for breakfast the next day.