1/2 (15-ounce) package refrigerated pie dough (such as pillsbury) |
1 cup packed brown sugar |
1/2 cup unsweetened cocoa |
1 tablespoon all-purpose flour |
3/4 cup 2% reduced-fat milk |
1/3 cup light-colored corn syrup |
1 tablespoon butter, melted |
1 teaspoon vanilla extract |
2 large eggs |
2 large egg whites |
1 cup frozen fat-free whipped topping, thawed |
1/2 teaspoon unsweetened cocoa (optional) |