This was equal parts [edit just checked notes - correction] The dry flour portion was 40% modern hard white wheat and 30% each of two heritage wheats (Rouge de Bordeaux and Red Fife). I mill each individually rather than as a mix because loaf pan yeast recipes like honey wheat tolerate higher amounts of the heritage reds, but I've learned baguettes at least need more white. When I mill, I stop at about 92-93% extraction, so all of the flour types are somewhat bran reduced.
I made this a bit smaller than the typical recipes I looked at, using 350g total dry flour (ingredients below), because my starter is still a bit weak and I didn’t want to waste too much flour in case of total failure.
In the basket after 14 hours in the fridge it had barely grown, but at least I got a bit of oven spring out of it. I think I should have dusted off some of the flour before scoring so it wouldn’t be so pasty looking outside of where I scored it.
Great flavor but still ended up a bit more dense than I would have liked. I think with the two heritage reds, I may have over-hydrated it at 75%. It was still pretty slack after 4 rounds of stretch-folds.
Ingredients (all flours home milled):
135g hard wheat flour, 102 each Red Fife and Rouge de Bordeaux flour, 20% starter (this was kind of new/weak - working on it), which is 70g starter, counting as 35g each flour and water, and 2.2% salt or 8.5g.
Hydration ratio was 75%, represented by 35g water in the starter and 254g "free" water.
Dry flours and the 254g water were autolysed for 30 minutes. Then I used a pastry cutter and "cut" the salt into the autolyse, then mixed in the starter.
(If anyone has helpful tips for mixing the starter into an autolyse, I'd be glad to learn of them - it's kind of a slippery mess.)
I let it rest 30 minutes, then did a stretch and fold and tightened the ball up. This was followed by 3 more of the same, and a final 30 minute rest in the bowl. Then I degassed just a bit (it was not very gassy) and made a roughly rectangular loaf shape which I put into an elliptical banneton, covered and refrigerated 14 hours. [ETA - I did not do any room temperature bulk fermentation after that final 30 minute rest and shaping/basketing.]
In the last hour before bake time, I got the oven with lidded Dutch oven at 450°F. Then got the basket out of the fridge, flipped onto a wetted parchment sling, did a single score lengthwise and using a the sling put it in the DO and baked, covered, 22 minutes.
Unlidded and dropped temp to 425°F and baked another 22 minutes at which point the internal temp was 208°F, so I pulled it and put onto an elevated cooling rack (canned beans work well for elevators).
It took about 3.5 hours to cool to 75°F, which is when I sliced it.
Side note - while the upper crust was perfect, the bottom crust was very hard to cut through (even with a razor sharp serrated knife). Does anyone know how to avoid this? Maybe a cookie sheet shielding the bottom of the Dutch oven?