Making Apple Gooey Butter Cake can be a breeze if you follow these steps carefully:

1. Preheat Oven: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking dish.
2. Make Cake Base: In a mixing bowl, combine the yellow cake mix, melted butter, and one egg. Mix until well blended.
3. Spread Mixture: Press the cake mix mixture into the bottom of the greased baking dish evenly.
4. Prepare the Filling: In another bowl, beat the cream cheese until smooth.
5. Add Eggs and Sugar: Mix in the three eggs, vanilla extract, and powdered sugar until thoroughly combined.
6. Add Apples: Gently fold in the diced apples and ground cinnamon.
7. Pour Filling: Pour the cream cheese and apple mixture over the cake base in the baking dish.
8. Bake: Bake in the preheated oven for approximately 30-35 minutes, or until the top is set and lightly golden.
9. Cool: Allow the cake to cool in the pan for about 10-15 minutes before slicing.
10. Optional Garnish: Dust with powdered sugar before serving, if desired.

By following these steps, you will create an incredible Apple Gooey Butter Cake that is irresistible and satisfying.