Chocolate cookie recipes needed: not "the best" but "good"--and trusted!

I’m an experienced cookie baker but have never made chocolate cookies. I would like to make some for Christmas. I am not interested in trying a fancy, elaborate recipe for “the best ever.” Instead I’d like to see your tried-and-true recipe for chocolate cookies that might not astonish the Queen of Belgium but are excellent and dependable nonetheless.

Chocolate, not chocolate chip.

I’ve seen the offerings here (general request for recipes) and asked about a specific process here. Now I’m just requesting suggestions for recipes you actually use for some kind of chocolaty chocolate cookie. I care much less about their looks than about the content of their character.

Thank you.