as long as its NOT low fat spread you should be fine, but i have to say home made cookies are so simple, and dont contain all the crap that the packets do, for some really simple fairly healthy ones you could try flapjacks, or oak cookies see below
100g marg or butter
50g light brown sugar
2 tbsp/40g clear honey
1/4 tsp ground mixed spice (optional)
100g self raising flour
100g oats
50g raisins / cherries or leave out if you dont like
Oven 170C/150C for fan ovens/gas mark 3
Put spread, sugar and honey in heatproof bowl and microwave on high for 30 secs to 1 min till all melted.
Stir in mixed spice, flour, oats and raisins then mix together.
Put tablespoons of mixture on prepared baking trays. Flatten tops slightly with a fork.
Bake for 15 mins until golden brown and crisp on base.