Combine brown sugar, water, pumpkin, and spices in saucepan
Simmer 5-7 minutes until thickened, stirring constantly
Add vanilla, strain through fine mesh, cool completely
Make strong espresso, let cool to room temperature
Place coupe glasses in freezer for 5 minutes
Add ice to cocktail shaker until half full
Add espresso, vodka, coffee liqueur, syrup, and cream
Shake vigorously 15-20 seconds until frothy and cold
Pour through strainer into chilled glasses
Dust with cinnamon, add 3 coffee beans to each glass
Serve immediately while foam is at peak