Looking for Blackberry Vanilla Jam recipe - is this one safe?
I was planning to make simple blackberry jam now that my little crop is coming in, but I read somewhere about a blackberry vanilla jam, which sounds like a nice twist. I tried using the search function on here, but no useful results came up (a common complaint, from what I understand). I found this one on the internet but am hoping one of you experts can enlighten me as to whether this would be safe. Similarly, if anyone can point me to one that IS safe, it would be much appreciated!
Blackberry Vanilla Jam
6 2/3 cups blackberries puree (after running them through a food mill on fine)
8 1/3 cups sugar
2 Tbsp. Vanilla extract
7 1/2 Tbsp. Ball Classic Pectin
Once the berries have been run through the food mill, put them in a medium sized non-reactive and heat through. Gradually add in the pectin and bring to a rolling boil that cannot be stirred down. Then pour in the sugar and vanilla. Return the jam to a boil and cook for 1 minute. Then, remove from the heat and pour jam into hot half pint/pint jars and process in a hot water bath for 10 minutes