Honey (Best Option)
1:1 (1 cup honey per 1 cup maple syrup)Honey works well because it has a similar sugar composition and hygroscopic properties, which help retain moisture in the doughnut batter. Its natural sugars caramelize during frying, contributing to a desirable crust and color.
When substituting honey, reduce other liquids slightly if the batter seems too wet, as honey is slightly thicker and more hygroscopic. Also, note that honey can impart a mild floral flavor that complements doughnuts.
Compared to maple syrup, honey results in a slightly different but still pleasant flavor profile and maintains the doughnut's soft interior and crisp exterior effectively.