Add all filling ingredients (sweet potato, sugars, spices, cornstarch, vanilla, and milk) to the blender.
1 & 3/4 cup cooked sweet potato, 12 oz evaporated milk, 1/2 cup packed brown sugar, 1/4 cup granulated sugar, 1 teaspoon vanilla extract, 2 teaspoon cornstarch, 1& 1/2 teaspoons ground cinnamon, 1/2 teaspoon ground ginger, 1/4 teaspoon ground nutmeg, 1/4 teaspoon ground allspice, 1/8 teaspoon ground cloves, 1/2 teaspoon salt