The rule of thumb when swapping sugar for honey in baked goods is the following: For every 1 cup of sugar, substitute 1/2 to 2/3 cup honey and subtract 1/4 cup of the water from the recipe. To swap the granulated sugar for honey in this easy challah recipe, use 1/8 cup (2 tablespoons) honey and reduce the water in the dough to 1/8 cup (2 tablespoons).