Anyone who has hosted a party knows how tired you are the next morning. The last thing you want to do is cook. You end up either eating leftovers or ordering pizza.
A great hostess gift is breakfast for the next morning! Especially if your host has people in town. How nice to have a wonderful breakfast ready to go!
Once I made a breakfast casserole for a friend who hosted New Years. But you don't have to make something homemade. Head to a nice market or restaurant and buy something pre-made. My friend Sarah brought me some fancy frozen chocolate croissants to enjoy the morning after my birthday party. More recently, I gave this pre-made quiche to a friend who hosted us for Thanksgiving. It was from Market Hall which is kind of a smaller, nicer Whole Foods type market.
If someone is hosting a party, a thoughtful gift is breakfast!