Honey (Best Option)
1 tablespoon honey per 1 tablespoon brown sugarHoney works well because it contains fructose and glucose, which caramelize similarly to brown sugar's sucrose and molasses content, enhancing the Maillard reaction on the burger surface. It also retains moisture, helping keep the burger juicy.
When using honey, reduce other liquids slightly to compensate for added moisture and mix thoroughly to ensure even distribution. Avoid overheating as honey can burn faster than sugar.
The final burger will have a slightly different but complementary sweetness and a moist texture, with a rich caramelized crust close to what brown sugar would produce.