Cost information for the following is not included. Normally this is because the quantity or ingredient is unknown
If you are having a hard time tracking down Muscovado sugar, dark brown sugar is a reasonable substitute.
zest of one lemon
1 1/4 cups / 5 oz / 145 g spelt flour
1/2 teaspoon fine grain sea salt
1 cup / 8 oz / 225g unsalted butter
1 2/3 cups / 7.5 oz / 215 g v. loosely packed dark Muscovado sugar
4 oz / 115 g bittersweet chocolate, barely melted
another 1/3 cup / 1.5 oz / 45 g Muscovado sugar (optional)