1In 8-quart bowl, mix strawberries with 3 3/4 cups sugar; set aside.
2Heat oven to 425°F. In 6- to 6 1/2-quart bowl, stir Bisquick mix, milk, 1 2/3 cups sugar and the butter until soft dough forms. Spread evenly in 4 ungreased 13x9-inch pans.
3Bake 15 to 20 minutes or until golden brown and toothpick inserted in center comes out clean. Cool slightly. Serve with strawberries and whipped topping.