Cherry Cobbler Cake

1 (18.25 ounce) box yellow Duncan Hines cake mix

Cobbler:
1/4 cup water
1 cup granulated sugar
1/2 cup (1 stick) butter
1 teaspoon cinnamon
1 teaspoon vanilla extract
1 can cherry pie filling

Prepare cake according to box directions, and pour into a 13 x 9-inch baking pan. Set aside while preparing Cobbler.

Cobbler: Mix all ingredients together and boil until thick. Pour half of Cobbler over cake batter. Bake as per directions on box.

When cake has baked and cooled, ice with the remaining half of Cobbler.