Preheat oven to 350 degrees.
Melt the butter in a 9-by-13-inch baking dish. Mix the flour, 1 cup sugar, baking powder and salt in a bowl. Stir in the milk gradually. Pour this mixture into the baking dish.
Combine the strawberries, water and remaining sugar. Pour this mixture over the batter and sprinkle with cinnamon.
Bake for 45 minutes, or until golden brown. Cut into squares or spoon into dish and top with whipped cream or ice cream. Enjoy!