Traditional Gingerbread biscuits

These gingerbread biscuits are the best recipe I've found and have been the most popular with everyone that has tried them. They contain no ginger!
Unfortunately when I wrote this recipe out many,many years ago and used some sort of electronic paper that slowly has faded the text.
Fortunately I had typed this recipe out for friends and hope that they can fill in the gaps for me.

1 egg

2 tblsp black treacle

2 tspns ground mace

2 tspns ground cinnamon

250g butter

oz of plain flour or dark rye flour

castor sugar
2 tspns dark chocolate powder
baking powder

What to do

Mix together egg, treacle, sugar and spices in a bowl. Melt butter, when it begins to cool blend into mixture. Sift baking powder and flour into mixture and using hands bind well and shape into a round ball. Cover with cling film and chill for 30 minutes.
Pre-heat oven to 170 degrees and grease several baking trays. Roll dough out on a lightly floured surface a little thicker than usual . Cut into shapes, place onto greased trays and bake in oven for 15-20 minutes.