Step 1: Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.
Step 2: In a mixing bowl, combine the yellow cake mix, melted butter, and 1 egg. Mix until well combined. Press the mixture evenly into the bottom of the prepared baking pan to form the cake layer.
Step 3: In another mixing bowl, beat together the softened cream cheese, 2 eggs, pumpkin puree, vanilla extract, cinnamon, nutmeg, and ginger until smooth and creamy.
Step 4: Gradually add the powdered sugar to the pumpkin mixture and mix until fully combined and silky.
Step 5: Pour the pumpkin mixture over the cake layer in the baking pan, spreading it evenly with a spatula.
Step 6: Bake for 40-45 minutes, or until the edges are set and the center is slightly gooey.
Step 7: Allow the cake to cool before serving. Optional: dust with powdered sugar before serving.
Notes
Store leftovers in the fridge for up to 5 days. You can freeze individual pieces for up to 3 months.