Good-Cooking - Pumpkin Gooey Butter Cake

Ingredients

• 1 (18.25 ounce) box yellow cake mix
• 1 large egg
• 1/2 cup (1 stick) butter, melted
• 8 ounces cream cheese, softened
• 1 (15 ounce) can pureed pumpkin
• 1/4 cup granulated sugar
• 1/4 teaspoon salt
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg
• 3 large eggs
• 1 teaspoon vanilla extract
• 1 (16 ounce) box confectioners' sugar, divided
• Pecan halves, for garnish
• Whipped cream, as an accompaniment