Whisk together the pumpkin, spices and the milk in a medium saucepan.
1 Cup Canned Pumpkin, 2 teaspoons Pumpkin Pie Spice, 2 Cups Whole Milk
Heat gently over medium heat until very hot, but not boiling.
Whisk the egg yolks, brown sugar and salt until the egg yolk is light in color.
4-6 Egg Yolks, 1/2 Cup Brown Sugar, Dash Salt
Slowly add 3 tablespoons hot milk mixture to the eggs while whisking.
1 Cup Cream
Pour all of the egg mixture into the pan.
Gently cook over low to medium heat, until it starts to thicken and reaches 160 degrees F on an instant read thermometer. (Don't let it exceed 180 degrees, or it will curdle. If you don't have a thermometer, cook until the custard is thick enough to coat the back of a wooden spoon.)
Strain the cooked custard through a fine mesh sieve into a clean bowl and add the cold cream.
Chill until completely cold.
Follow your manufacturer instructions to make the ice cream.
Place a little in a container, add a sprinkle of graham cracker crust, top with more ice cream and repeat the process.
1 Cup Graham Cracker Pie Crust
Freeze until firm.
Notes
Times do not reflect the time needed to freeze ice cream in your ice cream machine. Follow instructions from manufacturer.Homemade Graham Cracker Crust2 cups graham cracker crumbs1/4 Cup Sugar1/2 Cup Butter, melted. Mix all together and press into a pie dish or just in a parchment lined cake pan. Bake at 350 for 8-10 minutes and allow to cool. Break into bits.