Pumpkin Coffee Cake with Brown Sugar Glaze

1/3 cup water
1 (15 ounce) can pureed pumpkin
2 eggs
1 tablespoon vanilla
2 teaspoons pumpkin pie spice
1 (18 ounce) box yellow cake mix
1 teaspoon baking soda
1/2 cup brown sugar
1/2 cup all purpose flour
4 tablespoons butter, melted

Preheat oven to 350 degrees.  In a large bowl, mix water, pumpkin, eggs, vanilla, and pumpkin pie spice.  Add in cake mix and baking soda and mix until combined.  Pour batter into a greased 9x13 baking pan.  In a small bowl, mix together brown sugar, flour and melted butter.  Sprinkle over the top of the cake.  Bake for 25-30 minutes or until an inserted toothpick comes out clean.  Serve cake when warm or cooled to room temperature.
Recipe Source - Six Sisters' Stuff