The Mixture I made for The Mixtures Party

I made brownies for this project where the class brings in mixtures. In the beginning the brownies were just separate items but when you mix them together and they were heterogeneous or a mixture because you can separate them and they are not mixed evenly. When you mixed them by stirring in eggs,water and oil,it turned into homogeneous or a solution. Then when I baked it there was a chemical change and when it was all done it was homogeneous(solution).