Easy Skillet Blackberry Cobbler

Ingredients

1 box of 2 refrigerated pie crusts (I prefer Pillsbury)
2 (14-16 oz) bags frozen blackberries
1 stick butter, melted
1⅓ cups sugar (for berries)
½ cup flour
¾ cup sugar (for crust)
½ stick butter, cut into small cubes
½ cup water