Martini:

1. Brew espresso and let it cool to room temperature, then add all of the ingredients to a cocktail shaker half-filled with ice. Shake vigorously for 10-15 seconds.

2. Strain the chilled mixture into a martini glass and dust with a touch of pumpkin pie spice blend or cinnamon. Cheers!

Pumpkin Spice Simple Syrup (if not using store-bought):

1. Add maple syrup, water, and pumpkin pureé to a small saucepan and whisk together over medium-high heat.
2. Using a small paring knife, carefully cut a slit in the vanilla bean from the top to the bottom. Using the edge of the knife, scrape the seeds from the vanilla bean pod. You may need to scrape more than once to make sure you get everything. 
3. Add cinnamon sticks, ginger, vanilla bean seeds (as well as the leftover pod) and cloves to the saucepan. Bring the mixture to a boil, then reduce heat slightly and simmer for 5-7 minutes.
4. Remove from heat and let the mixture sit for 15-30 minutes. Remove the cinnamon sticks and vanilla bean pod with tongs, then strain the simple syrup through a fine mesh sieve. You'll have to use a spatula to push the liquid through, since the pumpkin puree residue makes it thick
5. Get as much liquid out as you possibly can, then transfer to a mason jar or other sealed container for storage.