Meanwhile, in a small saucepan combine milk, canned pumpkin or syrup, sugar, vanilla and pumpkin pie spice. Warm over medium heat, whisking constantly, until hot and frothy. Do not bring to a boil.
Pour the espresso into a large mug or two small mugs.
Pour the pumpkin-spiced milk over the espresso.
Top with whipped cream and sprinkle with pumpkin pie spice, nutmeg, or cinnamon, if desired.