In a small bowl, stir together the onion soup mix, garlic powder, celery salt, thyme, and basil.
Place thawed turkey breast in a 9 x 13 inch baking dish.
Rub dry seasoning mixture onto surface of turkey evenly.
Pour 1 cup of chicken broth into the bottom of the baking dish.
Bake at 350 degrees for anywhere from 1 1/2 hours to 3 hours (or more) depending on the size of your turkey - consult the instructions on your turkey for specifics, but usually 15 - 20 minutes per pound.
About 45 minutes into cooking, pour another cup of chicken broth over the top of the turkey.
Repeat again after another 45 minutes of cooking, using the remaining cup of chicken broth.
Baste the turkey every 45 minutes thereafter, until turkey is done and registers 165 degrees on a meat thermometer place deep into the breast meat.
Remove from the oven and cover the turkey with foil.
Allow it to rest for 15 minutes before slicing. I like to slice the turkey and then allow the slices to sit in the bottom of the pan soaking up all the juices until everyone's ready to eat.