who only by moving can balance

This is a pretty convincing base recipe (and if you sign up to her mailing list you get a PDF of the rest, but the link isn't uniquely generated so ask me nicely and I might accidentally paste it to you). I ended up baking them for 12 minutes at 180 and will probably give the next batch 14 (they spread out a SURPRISING amount as they're cooling once they're out of the oven); this time round I used a hard rather than a soft dark brown sugar and stirred it into fairly cool (but liquid) butter, and I think for the next batch I will in fact use soft.