Beet Kraut
Introduction
Unsurprisingly, this is beets plus cabbage. It turns a lovely purply color even when using green cabbage and the brine that develops is not as viscous as straight up beets. I've recently done two batches so I'll put the information side by side for comparison.
Getting started: Ingredients, Tools, and Method
Batch 1
683 g green cabbage cut thinly with knife
667 g beets cut using the thin julienne blade on a mandolin
Salt + Veg Method: 2% Diamond kosher salt by weight (worked out to 27g)
Small pottery crock with ceramic weights and water moat
Barn varies 55-65F so used kombucha mat set to 70F
Batch 2
630 g green cabbage cut thinly with knife
893 g beets cut using the thin julienne blade on a mandolin
Salt + Veg Method: 2% Diamond kosher salt by weight
added about 2 tbs brine from previously fermented plain kraut because batch seemed dry
Small pottery crock with ceramic weights and water moat
Barn being used as kitchen so heated during day to 67F (did not use mat)
The 3 main differences were
a) temperature/utilization of kombucha mat
b) slight difference in cabbage:beet ratio
c) addition of old brine with all its fermenty goodness to Batch 2
Summary
The addition of the brine to Batch 2 possibly sped up the process.
Even though pure beets work better with a brine solution, the salt-only method works perfectly well when beets are cut with cabbage. Around a 50:50 cabbage:beets ratio should work with leeway in either direction.
This has become a go-to even though I originally wanted to have a pure beet ferment on hand. Temperatures 65-70F are working out.