Netix (and Dusty!) - I never sift my flour ! If I'm using a bowl, I just run a whisk through it when adding it to the bowl, or if in an electric mixer, do a few high rotations on the mixer (Martha Stewart hint!).

I found my recipe book, here it is.

Expresso Biscuits

300g plain flour (approx 2 cups)
pinch salt
200g unsalted butter
150g castor sugar (approx 200ml)
3 Tblsp cocoa
1 Tblsp cinnamon
1 tblsp strong ground coffee

I actually use my food processor for this recipe ...

1. Rub together flour, salt & butter (in food processor, use the non-cutting blade thingy)
2. Add rest of ingredient, process until well mixed
3. Add 1/4 cup cold water slowly (this will bring the dough together)
4. Refrigerate while oven preheats to moderate heat
5. Roll dough out into a log approx 1" diameter. Cut into slices just under a cm wide
6. Place slices on tray lined with baking paper, press fork into top of slices to make a slight pattern.

Cook about 15 mins (or until they smell really yummy and are just slightly soft)
Cool on tray and then transfer to wire rack.

I also cheat and just take walnut-sized balls and press them into a ball then indent with fork.

They will make approx 30.