Pumpkin Gooey Butter Cake

My mom makes this Recipe every Thanksgiving and Christmas and it´s one of my favorites to eat during the holiday season.

Cake:

1 (18 1/4-ounce) package yellow cake mix

1 egg

8 tablespoons butter, melted

1 (8-ounce) package cream cheese, softened

1 (15-ounce) can pumpkin

3 eggs

1 teaspoon vanilla

8 tablespoons butter, melted

1 (16-ounce) box powdered sugar

1 teaspoon cinnamon

1 teaspoon nutmeg