Many ponies leave out cookies on the night of Hearth's Warming Eve. It's tradition, after all.

It's been a tradition for a very long time.

Story: https://www.fimfiction.net/story/307626/hearths-warming-cookies

Art: https://cdn-img.fimfiction.net/story/a5wz-1451104881-307626-full

Music: Serenity