In the bowl of a stand mixer fitted with the paddle attachment, combine the pumpkin puree, heavy cream, granulated sugar, brown sugar, milk, eggs, pumpkin pie spice, cinnamon, vanilla, and salt. Mix on low speed until smooth.
15 ounces (425 g) pumpkin puree, 1 cup (240 ml) heavy cream, 1 cup (200 g) granulated sugar, ¼ cup (50 g) light brown sugar, ¼ cup (60 ml) whole milk, 3 large eggs, 1 tablespoon plus 2 teaspoons pumpkin pie spice, 1 teaspoon ground cinnamon, 1 teaspoon pure vanilla extract, ½ teaspoon salt