Your home is up for sale and you have a viewing request, bingo! It's showtime...Imma bake a cake.
Don't bake a cake. It makes buyers think you're up to something. If buyers think you're trying to trick them they form a negative impression of you. They wonder what else you're trying to hide.
The best smell is no smell.
When you have a showing, just make sure you don't cook a smelly meal, clean the cat litter, and take your smoke break outside.
Maybe open the doors and windows for a few hours and let the fresh air do its thing.
Don't bake a cake.