Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish with butter or nonstick spray.

In a large mixing bowl, combine the yellow cake mix, melted butter, and 1 egg. Stir until the mixture forms a thick dough-like consistency.

Press the dough evenly into the bottom of the prepared baking dish to form the crust.

In another large bowl, beat the cream cheese and softened butter together until smooth and creamy.

Add the pumpkin puree, remaining 2 eggs, powdered sugar, vanilla extract, cinnamon, nutmeg, ginger, and salt to the cream cheese mixture. Beat until fully combined and smooth.

Pour the pumpkin mixture over the crust, spreading it out evenly with a spatula.

Bake the cake in the preheated oven for 40-45 minutes, or until the edges are set but the center remains slightly gooey.

Remove the cake from the oven and allow it to cool completely in the pan before slicing.

Serve as-is or with a dollop of whipped cream for extra indulgence.