Preheat oven to 175°C or 350°F. This helps the cake bake evenly and gives the perfect soft and gooey texture.

In a bowl, mix cake mix, egg and melted butter. Stir until thick dough forms with a soft and slightly sticky texture.

Press the dough into a greased baking dish. Spread evenly to cover the bottom and create a firm base layer.

In another bowl, beat cream cheese until smooth. This removes lumps and gives a creamy texture to the topping.

Add pumpkin puree, eggs and vanilla extract. Mix well until smooth and fully combined into a rich mixture.

Add powdered sugar, cinnamon and nutmeg. Mix slowly to avoid lumps and create a sweet and spiced filling.

Pour melted butter into the mixture. Mix gently until smooth, creamy and slightly thick in texture.

Pour pumpkin mixture over the base layer. Spread evenly using a spatula so it bakes evenly and looks smooth.

Place in oven and bake for 45 minutes. The center should be slightly soft while edges become golden and set.

Let the cake cool completely before slicing. This helps the layers set and gives the best gooey texture when served.