Place the butter, cocoa and chocolate in a microwave safe-bowl. Microwave, uncovered, at 50% power for 20 seconds; stir. Microwave at 50% power 20 seconds longer; stir until smooth. Add the eggs, egg whites, confectioners' sugar, brown sugar and vanilla; mix well. Stir in flour and salt until blended. Pour into seven 6-oz. custard cups coated with nonstick cooking spray.
Place custard cups on a baking sheet. Bake at 450° for 10-12 minutes or until a thermometer inserted near the center reads 160°. Remove from the oven and let stand for 1 minute. Run a knife around edge of custard cups; invert onto individual dessert plates. Serve immediately. Yield: 7 servings.

Notes: This recipe was tested in a 1,100-watt microwave.

Nutritional Information per Serving: Nutritional Analysis: One cake equals 346 calories, 14 g fat (9 g saturated fat), 114 mg cholesterol, 196 mg sodium, 47 g carbohydrate, 2 g fiber, 8 g protein.
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