Maple Bar

It's a sweet doughnut topped with a rich maple glaze.
Overview
Maple Bar is a cooked dish that can be prepared in the kitchen of an upgraded farmhouse or with a Cookout Kit. It may appear for sale at the Traveling Cart, can be bought from Sam's shop at the Desert Festival for Calico Eggs, and one can also be obtained by opening a Mystery Box.
It has an edibility of 90 and sells for 300g. When consumed, it provides a buff lasting 16 minutes and 47 seconds.
Maple Bar is also used in tailoring and dyeing. Placing it in the spool of the Sewing Machine creates the Dirt Shirt, and it can be used as an orange dye item at the dye pots in Emily and Haley's house.
Official description
It's a sweet doughnut topped with a rich maple glaze.