Pumpkin Dump Cake

1 large can pumpkin
1 cup evaporated milk
1 tablespoon pumpkin pie spice
1 (18.25 ounce) box yellow cake mix
1/2 cup (1 stick) butter, melted
Chopped or whole pecans

Mix pumpkin, evaporated milk and pumpkin pie spice. Pour into a 9 x 13-inch cake pan. Sprinkle box of yellow cake mix over top evenly. Drizzle butter over top. Sprinkle with chopped or whole pecans. Bake 350 degrees F about 20 minutes.