1. In a blender, combine all the pumpkin spice mixture ingredients. Puree for about 30 seconds. If you want a smoother mixture, puree for a couple minutes, or until the mixture is to your desired consistency.
2. Pour 1/2 cup (more or less, depending on your preference) of the pumpkin spice mixture into a large mug. Microwave for about 20 seconds, then add 1 cup of hot strong brewed coffee and stir. Top with a nice lofty pile of sweetened whipped cream. Sprinkle lightly with cinnamon. And if you're looking for extra deliciousness, top with chocolate shavings. So pretty!
3. Pour the remaining pumpkin spice mixture into a quart jar or similar sized container and top with a lid. Store in the refrigerator. When ready to make another drink, shake the jar well and repeat the assembly of the pumpkin spice latte. The pumpkin spice mixture will keep well for up to 1 week in the refrigerator.