Source: Nigella Lawson's How to Be a Domestic Goddess Changes I've made include:  Reducing the brown sugar from 1 2/3 cups to 1 1/2 cups. I find dark or light works just fine.  Replacing the water with coffee and booze. I use my Nespresso machine to make espresso, which I add water to to make 1 cup. If you don't feel like adding booze or coffee, simply use 1 cup plus 2 tablespoons boiling water instead. Upped the vanilla. Added salt.