This is a modern take on a Kvass (but since no BJCP style for that, and the fact that this bread has salt in it, listing it here as a Gose). Kvass would traditionally use old rye bread in the mash; I'm instead using three packages of Falu Råg-Rut Rye Crispbread (from Sweden) that is past its best-by date. Each package is 235g, so for three that would be about 705g total wt, but carbohydrates listed as about 60g per 100g serving, so 420g carbs is about 15 oz... entered in the recipe above as raw rye (for lack of better substitute). Planned recipe like that, but actually got much better efficiency (would’ve been 92%!) with those numbers, so by making it 25 oz - or approx full weight of bread, it calculates out to a more normal 80% efficiency... but also made it more of an Imperial Kvass or Gose!). Also, says 1.2g salt per 100g serving, so entered that in the water chem section as 8.4 g NaCl.

Add bread to entire mash volume of boiling water to cover (to gelatinize starches), mix up to break it down, and let it sit until it drops to mash strike temp, then add milled grain to hit mash temp. Then mash (no sparge) and boil normally from there. Use rice hulls if normal lauter... was very viscous! I BIAB, so normally don’t use rice hulls, but had an absorption rate of 0.15 gal/lb, vs my normal rate of 0.06-0.075.

It would traditionally be spontaneously fermented, and get just a slight sourness... so I'm using Philly Sour Lachancea (ferments and sours), and adding some crystal malt to offset sourness with some residual sweetness (could mash higher, too). Could also kettle sour, or even just use normal sacc yeast and add some lactic acid or lemon juice.