Give me three reasons why someone should buy cookies from a supermarket!
OK, make one reason start with an "X", one end with a "P" and one whatever. You're having difficulties with that?
Honestly, if you prepare your own cookies ... you have the power and are in control what gets in there, it doesn't take much time and they are much tastier, that is if you are no complete looser in the baking department.
200 g of sugar (icing sugar, if you have)
150 g butter
100 g peanut butter
250 g spelt flour
100 g dark chocolate
First of all, cream the sugar and the butter ... sort of.
Then add the flour and ... ah ... just go for it. Have the chocolate in reasonable sized chunks (whatever reasonable is supposed to mean) and put it in as well.
Mix all together ... do it well!
Making cookies by the size according to your liking and arrange them on a baking tray with ... reasonable ... distance in between and bake at 200°C for 10-15 minutes (depending on your oven - just remember: the cookies are not supposed to be black).
Allow sufficient time for the cookies to cool down so you can enjoy them to the full! I'm not sure, though, whether I should really have four of them.
Just think a bit about it ...
You can have any flavouring you like. If you don't try, you will never find out.