In a mixing bowl, mix the room temperature cream cheese with the sugar, cornstarch, vanilla and milk until smooth and well combined. Make sure there are no lumps.
6 oz. cream cheese, room temperature, 3 tablespoons granulated sugar, 1 tablespoon (15 ml) milk , 1½ teaspoons cornstarch, ½ teaspoon vanilla extract
Transfer the cream cheese mixture to a piping bag fitted with a Wilson 2A tip. If you don’t have a piping bag or the recommended tip, transfer to a ziplock bag and cut the tip of the bag when it is time to pipe the filling into the pumpkin muffin batter. If the filling is really thin, transfer the piping bag to the fridge to chill.
In a mixing bowl, whisk the flour, baking powder, baking soda, ground cinnamon, pumpkin pie spice and salt together until well combined. Set aside for now.
2 cups (240 g) all purpose flour, 2 teaspoons baking powder, ½ teaspoon baking soda, 2 teaspoons pumpkin spice, 1 teaspoon ground cinnamon , ½ teaspoon salt
In another bowl whisk the pumpkin puree, oil, granulated sugar, light brown sugar, eggs, vanilla extract and milk together until well combined. Mix the dry ingredients into the wet until just combined. For the best pumpkin cream cheese muffins, let the muffin batter rest at room temperature or in the fridge for 30 minutes while the oven preheats. 1¼ cups (325 g) canned pumpkin puree, ½ cup (120 ml) neutral baking oil , ½ cup (100 g) granulated sugar, ½ cup (100 g) light brown sugar, 2 large eggs, room temperature, ½ cup (120 ml) milk, room temperature, 2 teaspoons (10 ml) vanilla extract
Preheat the oven to 425 F (218 C) for 30 minutes. Line (1 - 2) 12 count muffin pan with 12 cupcake liners. I recommend alternating filled cups with empty cups for the best rise. Use a 3 tablespoon sized cookie scoop to scoop the pumpkin muffin batter into each of the muffin liners, alternating every other cup. Insert the piping bag with the tip (or ziplock with corner cut off) about ¼ inch into the top of the muffin batter. Firmly press the piping bag to push the cream cheese filling to the the muffin batter, while pressing the cream cheese filling into the muffin batter, gently pull the piping bag up to the top of the muffin batter while continuing to press on the bag to expel the cream cheese filling. Make a circular top of cream cheese in the center of the batter. Repeat for all the remaining muffins. Top all the muffins with pumpkin seeds around the cream cheese center.
¼ cup pumpkin seeds for topping, optional
Bake the muffins at 425 F (218 C) for 6 minutes. Without opening the oven door, reduce the oven temperature to 350 F (177 C). Bake the muffins for an additional 12 - 15 minutes (total of 18 - 21 minutes). The muffins are done when a toothpick inserted into the center comes about with a few moist crumbs. Cool the pumpkin cheesecake muffins in the muffin pan for 5 - 10 minutes. Carefully remove the muffins to cool to room temperature and enjoy.