Whisk together honey, milk, oil and water until the honey has dissolved, then sprinkle active dry yeast across the top. Let sit for 10-15 minutes.
In a large mixing bowl, whisk together flours and salt and let sit for 10 minutes.
Pour in the yeast mixture and mix everything together. Cover and let rise until the dough has doubled in volume, about 1 hour. It will be sticky and well-hydrated. If you don’t intend to bake it right away, at this point you can place the bowl in the refrigerator, still covered, where it will keep for up to a week.
Once you’re ready to bake, butter a loaf pan. Using your hand or a dough scraper, pull the dough out onto a lightly floured surface, taking care not to completely deflate it. Flour your hands and/or dough scraper and shape it into a loaf. Next, take one end and lift and fold 1/3 of the dough into the center as if you were folding a letter. Repeat with the other end, then turn and place loaf seam side down in buttered loaf pan. If needed, lift each end from the middle and gently stretch it into the corners so the dough fills the pan. Set aside to let rise for 1 hour or until it has risen 1/2 an inch or more above the edges of the loaf pan.
Position a rack to the centre of the oven and preheat to 350ºF (180ºC). Bake for 40-45 minutes until the top is a rich, golden-brown colour and it sounds hollow when you tap on the top. Turn loaf out onto a wire cooling rack and let cool for 1 hour before slicing to allow the cooking process to complete.