To make the cookies, melt the butter and allow it to cool slightly.
Sift the flour, add the bicarb of soda, spices, honey, lemon juice, melted butter and eggs beaten lightly.
Knead gently to get a dough that does not stick to the hands - add more flour if necessary.
Cover the dough with clingfilm and refrigerate for 30 minutes.
Preheat the oven to 200 degrees Celsius (390 Fahrenheit).
Make balls out of the dough the size of a walnut, and arrange them on a baking tray lined with non-stick paper - leave enough room between cookies as they double their volume.
Bake for 10 minutes until golden brown and firm to touch.
Leave to cool completely.
To make the icing, sift the icing sugar, add the boiling water and mix well to get a lump-free icing.
When the cookies have cooled, drizzle the icing over, and leave to dry completely.