Polka-dot Brownies

Ingredients

 * 3 oz semisweet chocolate
 * coarsely chopped - or -
 * 3 oz semisweet chocolate chips
 * 1/2 cup red-cal. margarine (tub)
 * 4 lg eggs (room temperature)
 * 1/2 cup granulated sugar
 * 1 tsp vanilla extract
 * 1/4 tsp salt
 * 3/4 cup all-purpose flour
 * confectioners' Sugar and/or
 * unsweetened cocoa powder
 * to garnish (optional)

Directions
Preheat oven to 350. Lightly spray an 8" square baking pan with nonstick cooking spray. In top of double boiler, over barely simmering water (or in microwave), melt chocolate and margarine; remove from heat and stir until smooth. Set aside to cool to room temperature. In large bowl, with electric mixer at high speed, beat eggs and Sugar until pale yellow, thick and tripled in volume, about 7 minutes. Beat in vanilla and salt