I would say yes the stone was too hot and or the scones were in too long, considering the heat capacity of the stone.
How sure are you of your ovens accuracy? Why did you opt to use the stone as opposed to placing the baking sheet on the middle rack of the oven? How soon after the oven and stone were preheated did you place the scones in the oven?
All the questions are just some things you may want to consider when you attempt your next batch. |