In a medium saucepan over medium heat, whisk together the heavy cream, half and half, espresso powder and spices and bring to a simmer. Meanwhile, using a hand mixer on medium speed, beat the egg yolks and granulated sugar together until the mixture becomes light in color and falls from the beaters in ribbons.

Remove one cup of liquid from the cream mixture and gradually pour into the egg yolk mixture, beating the entire time, to temper the eggs. Add tempered egg mixture back to the saucepan and whisk well. Add the pumpkin puree and continue to whisk until the mixture is smooth. Reduce heat to medium-low and continue cooking until the custard has thickened and coats the back of a wooden spoon.

Transfer the custard to a large mixing bowl, preferably one with a pour spout, and cover with plastic wrap, pressing the plastic wrap against the surface of the custard. Chill for at least two hours, or overnight.

Freeze the custard in an ice cream maker according to manufacturer’s directions. Once the ice cream has reached soft serve consistency, transfer to an airtight container and freeze for 3-4 hours, or until ice cream has hardened. To make the ice cream easily scoopable, allow it to sit at room temperature a few minutes before serving.