Roll out the pie crust and place in a 9-inch deep dish pie plate. Crimp edges and place in refrigerator until ready.
Mix 15 oz can pumpkin puree, 3 large eggs, ½ cup sour cream, ⅔ cup maple syrup, 1 teaspoon vanilla extract, 1 teaspoon ground cinnamon, and 1 teaspoon pumpkin pie spice until smooth and completely combined.
Pour into prepared pie crust.
Bake on the bottom rack at 425°F for 15 minutes. Then reduce the heat to 350°F and continue to bake for about 40 minutes or until set. Be sure to watch the edges of the crust and cover them if they get too dark.
Cool on a rack at room temperature for 2 hours and then refrigerate until ready to serve.