Add all ingredients, except for the butter, to the bowl of your stand mixer with dough hook attached. Mix until the dough comes together into a rough/shaggy mix.
Add softened butter 1 tbsp at a time into the dough, allowing it to be fully incorporated before adding the next.
Knead/mix the dough on low/medium low until dough is smooth and elastic, clearing the sides of the bowl.
Place dough in a lightly greased bowl and allow to rise for 90-120 min.
Line an 8.5x4" loaf pan with parchment and set aside.
Gently transfer the dough to a lightly greased counter. Pat out the dough into an 8x10" rectangle.
Roll the dough up on the short side and place into 8.5x4" loaf pan. Cover dough with greased cling wrap or a floured tea towel.
The dough is ready when the top of the loaf has risen slightly above the edge of the loaf pan. This should take 30-60 min. Preheat oven to 350°F while dough is proofing.
When bread is ready to bake, bake on center rack for 40 min. The bread will have a nice golden color on top.
Remove bread from pan to wire cooling rack immediately. Wait until bread has cooled completely before slicing into, this may take a few hours. Enjoy!
