I tried to make Delia's plain scones yesterday. There were edible but had not risen very much at all.
I can only get plain flour, if I remember correctly you once told me that one of Delia's teaspoons of baking powder to 100g flour is about right. I used 225g plain flour and 4 x 5ml teaspoons baking powder, Is it possible to use too much BP? I could almost taste it in the scones.
I also had another power outage yesterday, only for 10 minutes and that was before I made the scones. So if this is going to become a regular thing, stand by for more me asking for more help!
Yes it is possible to add too much raising agent and taste it.
Perhaps try with 3 teaspoons for the 225g next time.
Had your oven come back up to the 220°C following the outage?
Also was your scone mixture a little dry? It shouldn’t be wet but it needs enough liquid for the dough to feel soft and easy to roll. A bit on the damp side is better than dry really.
Yes, it was probably on the dry side as they were a bit crumbly. Regarding the oven temperature, I can't be sure it had reached 200 degrees (it's a fan oven) as it's not particularly reliable and I had taken the thermometer out to clean its rather dirty glass and had not put it back.