Preheat oven to 160C (fan forced) and line 2 biscuit trays with silicone paper.
In a food processor add butter, both types of sugar and vanilla extract and whiz until light and fluffy.
Scrap down the sides, add the egg and whiz until just combined.
Add the flour and linseed meal and whiz until combined.
Roll dessert spoon worth of dough into balls, place on baking paper 3cm apart and slightly flatten.
Top with 6 choc chips pressed slightly into the dough.
Bake in middle of oven for 15 – 20 minutes or until lightly browned.
Cool on trays, then store in air tight container.