1. Heat oven to 350°F. Grease 13x9x2-inch baking pan.
2. Beat eggs in large bowl until foamy; gradually beat in sugar. Blend in butter and vanilla extract. Stir together flour, cocoa, baking powder and salt; add to egg mixture, blending thoroughly. Stir in white chips. Spread batter into prepared pan.
3. Bake 25 to 30 minutes or until brownies begin to pull away from sides of pan. Cool completely in pan on wire rack. Cut into bars.