I love cow biscuits too, and after seeing your post found this home made recipe to try:
Malted Milk Biscuits
These taste very like the malted milk biscuits you can buy in packets: the ones with the bobbly bits and pictures of cows stamped on them.
110g (4oz) softened butter
50g (2oz) unrefined or golden caster sugar
225g (8oz) plain flour
Tiny pinch of salt
1 dsp barley malt extract
4 dsp semi-skimmed Blackmore Vale Milk
You will need a large greased baking tray and a cookie cutter, ideally cow shaped or rectangular. Preheat oven to 180C (fan ovens) or equivalent.
Whiz the butter and sugar together until light and fluffy. Add the flour and salt. Whiz to mix and add the malt extract and milk.
Whiz until the mixture starts to clump together, then stop the machine. You may have to do this in stages as the mixture is quite dense, removing the lid and scraping the mixture down from the sides three or four times, particularly at the beginning.
Scoop the mixture out of the machine and knead it lightly together on a floured board.
Roll the dough to a thickness of just less than a pound coin. Cut into shapes and transfer to the prepared baking sheet.
Bake for 6-8 minutes until the biscuits are pale golden and just tinged brown round the edges.
Leave to cool and harden for a couple of minutes on the tray, and then transfer to a cooling rack, using a palette knife.
Once they are completely cold, store closely wrapped in foil in an airtight tin.
If you make these before I do please update on if they are any good or not 
I would love to also find a really good malteaser cake recipe if anyone knows of one? 