Cut bread into cubes several days ahead and let dry out. The day before or day of serving, make cornbread according to package. Make in one pan. Let cool and crumble or cube. Cook sausage until browned and remove to a bowl. Add onion and celery to drippings. If needed you can add the butter at this time. Add baking powder, salt, pepper, sage, and thyme to bread and corn bread. Mix with hands. Let's hope you washed those mits! Add sausage and chicken broth. Mix well. If needed add more chicken broth. Put in a greased pan or can stuff in a Turkey or chicken.