Can butter be used instead of shortening when making bread?

Yes, just know there may be some difference in texture. Shortening has less water so melts slower allowing more rise time and a higher and lighter product. Butter has more flavor but melts at a lower temperature so will spread out quicker and add a crispier texture. If you do interchange do so in equal amounts 1 cup of for 1 cup of the other. Make sure you read the recipe closely in case it says anywhere "Do Not Substitute". If you have this in the recipe there is a reason so do not try it.