Can I use blueberries that u have previously picked and froze? Also if i put it in a hot water bath will this extend shelf life?

Hi Liz, I'm sorry you haven't received an answer to this yet. Sometimes recipe authors miss notifications that there is a question about their recipe. You could always try sending her a direct message to ask by clicking the envelope button on her profile page:https://food52.com/users/153179-angela-brown