Fill a glass with ice and pour the cold brew coffee over it. Add the vanilla syrup to sweeten.
In a bowl, combine the heavy cream, oat milk, pumpkin puree, pumpkin pie spice, and vanilla extract. Use a hand frother or whisk to whip until fluffy and thick.
Spoon the pumpkin cream cold foam over the cold brew. Sprinkle additional pumpkin spice on top for garnish.