Blackberry Cobbler AKA Roly Poly Cobbler

1 1/2 cups water

3/4 cups sugar

1/2 tsp. cinnamon

3 Tbsp. butter

1/2 tsp. vanilla

4 cups fresh blackberries (or a combo of blackberries and raspberries)

3 1/4 cups Bisquick Original Pancake and Baking Mix (plus a bit to flour your work surface)

2/3 cups milk

1/4 cup sugar

1/4 cup butter (melted)