Chocolate orange snaps (used for christmas tree cookie cutters)

Need to double batch for full tree. 

190g plain flour

1/4 tsp salt

40g cocoa

1 tsp baking powder

110g brown sugar

110g butter at RT

1 egg at RT

1.5tsp orange zest

Icing (optional )

1 cup icing sugar, 1-2tsp milk

1. Preheat oven 180C (160 fan)
2. Whisk tog flour, salt, cocoa, baking powder
3. Cream tog sugar and butter 3-4 mins until light
4. add orange zest and egg and mix 1 min more
5. Add dry ingredients until dough comes tog
6. Shape into flat disk, roll out to 0.25" thick, cut out
7. Bake 10 mins (soft) or 12 (crispy)