Chicken cordon bleu is fairly easy to make. First, bake your chicken breasts in a covered dish for 45 minutes in an oven at 400 degrees. After that is finished, remove the cover and add a thin layer of ham on top of the chicken. Bake it for about 5 more minutes uncovered. Next, put a layer of cheese on top and let it bake for about 3 more minutes until the cheese melts. Now you have a delicious meal!