1 (18.25 ounce) package white cake mix
2 (2.5 ounce) packages instant white chocolate pudding mix
1 (8 ounce) container vanilla cream cheese
1/3 cup chopped pecans
Preheat oven to 350 degrees F (175 degrees C).
Prepare and bake white cake mix according to package directions, but do not spread. Stir together pudding mix and cream cheese. Press all ingredients 1 1/2 inches apart onto cake pan. Using a 1/3 cup scoop, scoop or pipe the resulting marshmallow mixture onto the cooled cake.
Sprinkle top with chopped pecans.