Honey (Best Option)
1:1 (1 cup honey per 1 cup agave)Honey works well as a substitute because it is a liquid sweetener with a comparable sweetness level and viscosity to agave syrup, which helps maintain the cake's moist crumb and tender texture. The sugars in honey also contribute to browning and flavor development during baking.
When using honey, reduce other liquids slightly (about 1/4 cup less per cup of honey) to compensate for its higher moisture content. Also, lower the oven temperature by 25ยฐF to prevent over-browning due to honey's sugar composition.
The final cake will be moist with a slightly different but pleasant flavor profile, often richer and more complex than agave, complementing the chocolate well.