01 - Preheat your oven to 350°F. Lightly grease a 2-quart baking dish or six 6-oz ramekins with cooking spray or butter.
02 - In a large mixing bowl, whisk together the pumpkin puree, whole milk, eggs, heavy cream, brown sugar, granulated sugar, and vanilla extract until completely smooth and well blended.
03 - Sprinkle in the pumpkin pie spice, ground cinnamon, and sea salt. Whisk vigorously until all spices are fully incorporated and no lumps remain.
04 - Pour the pumpkin mixture into the prepared baking dish, or divide evenly among the ramekins if making individual servings.
05 - Place the baking dish or ramekins inside a larger roasting pan. Carefully pour hot water into the roasting pan until it reaches halfway up the sides of the pudding dish.
06 - Bake for 40 to 45 minutes, or until the pudding is set around the edges but still has a slight wobble in the center, similar to cheesecake.
07 - Remove from the oven and carefully lift the dish out of the water bath. Let cool for at least 15 minutes before serving warm, or refrigerate for at least 2 hours to serve chilled.