Originally Posted by Dan
I had the same problem. Now I boil in a separate pot for 10 minutes. Transfer to a sanitized flask and bing to a gentle boil. It takes little to no heat on the flask if pre boiled.
I mainly just want my flask as a flat bottomed vessel I can use extremely hot liquids in and quick cool down without it shattering. Then onto a stir plate.
Extra pot involved and a few more minutes but this works okay for me
Dan, this is what I was attempting, what I didn't do was preheat the flask. It seems to be the best solution without adding non-beer ingredients. I think next time I'll make my starter wort a little higher gravity, and while it's boiling I'll boil the rest of the water in the flask, turn off the heat, add the wort, then get it back up to a gentle boil.
I wonder, though, if returning it to a boil is really necessary. I'm thinking I could sterilize the flasks in the oven, allow to cool with the foil on top, and add the boiled wort to the flask.
I'm also wondering if anyone pressure cans starter wort? It sure would save the time of boiling and cooling separate starters.
Thanks for the help, all! I'm glad it wasn't just me having the problem!