Fudgy biscuits

My Mum used to make these for my children when they were little. Found the recipe the other day, so thought I'd make some for the biscuit tin. She used to make 15 biscuits out of the mixture, I only made 12!

125g sr flour
125g butter [softened]
125g caster sugar
1 tbspn cocoa
90g oats
2 tbspns coffee essence [like Camp]

Preheat oven 180C/350F/gas 4

Put the flour, cocoa and sugar in a bowl, then rub in the butter.
Add the oats and the coffee essence and mix it all together into a ball.
Make small balls of the dough and put them on a greased baking tray. I use a silicone sheet.
Flatten the balls a bit then bake them for 15 mins.
Sometimes Mum used to roll them in extra oats, but I prefer them like this.