Rob, we wonder if you might simply have needed even a little more water in your dough. This could be true simply when baking in the dry winter, but especially so when using flours (like both whole wheat and bread flour) that absorb more liquid. Dry dough will create a more tight-knit loaf, one where the gluten strands are less extensible and more likely to break apart. Mollie@KAF
January 17, 2018 at 4:58pm
In reply to I substituted 10% wheat flour and used bread flour. Added a bit… by Rob Blakeley (not verified)