Originally Posted by hagbardceline
I'm going to rack onto the raspberries tonight. I have 40 oz of frozen berries. I was thinking of racking onto the frozen berries so any yeast/bac won't be able to grow on the berries before the alcohol and brewers yeast get them.
Is this a bad idea? Should I thaw first?
Also there will likely be star San foam in the carboy that the berries will hit. Any issue with that?
This will not get rid of wild yeast/bacteria...it might slow them down a bit at best.
There are two options:
1-steep berries in 170F water to kill off yeast/bacteria. This will result in a cloudy beer due to pectin. Pectic enzyme can be used to counter this problem, but option 2 is preferable.
2-Thaw berries. Crush 1 campden tablet/3-4 lbs of berries, and mix with 1/4 cup of boiling water. Pour over the berries (which should be in a sanitized container), swirl it around, and let this soak for 24 hours. Your berries will be sterilized at this point and can be added to the wort.