Preheat oven to 350°F. Spray 7 x 11 or 8 x 8 inch pan with vegetable oil. In a large bowl, beat eggs for 2 -3 minutes. Gradually add dry mix. Beat to moisten. Add butter and stir until combined. Fold in nuts, lightly mix. Pour in prepared pan and bake 25-27 minutes. Cool completely. For best results, freeze 1 hour before cutting. Makes 16 brownies.