Heat oven to 350°F. Grease 13 x 9 x 2-inch baking pan. Beat eggs in large bowl until foamy; gradually beat in sugar. Add butter and vanilla; beat until blended. Stir together flour, cocoa, baking powder, and salt; add to egg mixture, beating until blended. Stir in white chips. Spread batter into prepared pan. Bake 25-30 minutes or until brownies being to pull away from sides of pan. Cool completely in pan on wire rack. Cut into squares. Be sure to add a whole bunch of nuts on top to add a bit of crunch (optional).