What biscuits (otherwise known as cookies in the US) can I make that go well with coffee?

My parents are getting my sister an espresso machine for christmas and I am going to get her some cheap espresso mugs off ebay or somewhere and make her some biscuits cookies to go with her coffee (I am so broke and everything she wants is so expensive) She is very ‘brand’ orientated and likes expensive things which I simply can’t afford to give her. So rather that disappointing her and not being able to get her anything she wants on her list I think I will make her some biscuits cookies to go with her espresso and wrap them in a nice box with a ribbon to look classy (I hope).
Does anyone have any good biscuit cookie recipes that go well with coffee?

She also doesn’t have any dietary issues.

I don’t mean those scone type things that Americans call biscuits, I am talking about the things that Brits call biscuits! Some language confusion there!