Add the dark roast coffee and caramel coffee to a large mixing bowl.
Add in the pumpkin pie spice and ground cinnamon.
Stir well until the spices are evenly distributed throughout the coffee grounds.
Transfer the mixture to an airtight container or mason jar (an old coffee container works great).
Store in a cool, dry cupboard.
For a large 12-cup coffee maker, use approximately 4 tablespoons of the flavored coffee blend (approx 1 1/3 tbsp of the flavored coffee grounds mixture per 4 cups of water).
Brew as you normally would and enjoy!