No-Bake Cookies

Method

1. prep2 min
   room temperature
   line a sheet pan with parchment or wax paper and set the measured oats within arm's reach — once the syrup comes off the heat it begins setting immediately, and there is no time to be hunting for a pan
2. boil5 min
   medium, stirring until the butter melts
   sugar + butter + milk + cocoa + salt, stirring only until smooth, then stop stirring and bring to a boil you cannot stir down; hold that full rolling boil exactly 60 seconds. This is the whole recipe: the boil drives off water and concentrates the syrup to about 230°F. Short of it, the cookies stay tacky and never firm; past about 90 seconds the sugar concentrates too far and they dry into crumbs the moment they cool
3. mix1 min
   off the heat
   + peanut butter + vanilla, stirring until the peanut butter has fully dissolved into the syrup and the mixture is glossy — residual pan heat is more than enough, and putting it back on the burner scorches the cocoa and splits the peanut oil out as a slick
4. fold2 min
   working quickly
   + oats, turning until every flake is coated and no dry pockets remain; the oats drink the last free moisture, which is why quick oats set in half an hour and old-fashioned oats leave a wetter, chewier cookie
5. rest30 min
   room temperature, uncovered
   drop heaping tablespoons onto the lined pan and leave them alone until firm and matte on top. Chilling them in the fridge is faster but pulls condensation onto the surface, which dissolves the sugar crust and leaves them sticky and dull