The dough for these cookies is decidedly decadent, with a triple threat of chocolate using melted bittersweet, cocoa powder and stocky pieces of semisweet. The recipe didn't call for any, but I did add a splash of vanilla to the dough while mixing - it also didn't specify sweet or tart cherries. We went tart since that's what we have - I'd suggest the same if you make them, although I don't think it would be that big of a deal if you went sweet.
You should note in the recipe that I don't suggest preheating the oven before you begin the process - once the dough is combined, it will need a good half hour or more rest in the refrigerator to firm up, leaving you plenty of time to warm the oven. There's no point in having it blasting away when it won't be working (especially when its already way over 90 degrees outside!).
When you pull the cookies out from the oven, don't try to transfer them off the baking sheet for at least 4 or 5 minutes as they are delicate when they are hot. The directions did state to move them after a minute or two, which I did, only to see the sad cookie fall apart through the cooling rack! After leaving the rest to sit for a good 5 minutes before going near them, they held together as one would expect.
Close to brownie-like, these thick cookies are dense, moist and chewy, with chunky pieces of tart cherries and an abundance of those semisweet chocolate drops in each one. The baking time is important since you won't want to over-bake these for the best texture (moist vs dried out) - if you're not comfortable with the "until the edges are firm" is as far as doneness, let me suggest baking a test cookie or two to nail down the time before loading up a full tray.
If you touch the edge of the cookie it should be firm, but it shouldn't look like it is darkening more than the rest. The tops will be shiny and look set, but if you were to stick a toothpick in the center, it will look damp and underdone - this is what you want! As noted above, the cookies will finish cooking through the residual heat of the pan before moving them to the wire rack to cool.
Black Forest Cookies