Luxury Chocolate Buttercrunch Toffee

My Mahogany Buttercrunch Toffee is perhaps the favorite recipe in Rose’s Christmas Cookies. But this version is even more balanced and delicious—using Muscovado brown sugar and sandwiching the toffee between two coats of chocolate. The acidity in the brown sugar reacts with the baking soda to separate the toffee into layers, giving the toffee a less sticky and finer texture.