Preheat oven at 160C fan
Line a baking tray with greaseproof paper
Measure and sift and the dry ingredients together and set aside
Add softened butter, dark brown sugar and molasses to a separate mixing bowl and cream them until pale and fluffy
Add the boiling water the mix to loosen up the molasses , combine
Add the dry ingredients to the mixture, making sure to combine well
Add caster sugar to a bowl to dredge the cookie balls
With an ice cream scoop, make 12 balls of cookie dough
Roll each ball in the sugar bowl before placing them on the baking tray well spaced out.
With a flat bottomed glass, lightly press down on each ball flattening it into a cookie. They will still spread a little while baking so keep that in mind when placing them
Bake for about 15 mins. There should be cracks appearing on the top but still feel soft when pressed gently.
Leave to cool on a wire rack and store in an airtight container