In the bowl of a stand mixer, combine the warm milk, warm water, and honey. Sprinkle the yeast over top the liquids and let it sit for 5 minutes until it gets foamy.
Add the whole wheat flour and mix it into the liquids using the beater blade attachment just until the flour is moistened. Let that mixture sit for 10 minutes.
Next, add in the salt, butter, and the bread flour. Using the stand mixer with the dough hook attachment, beat the dough for 10 minutes. (If you don't have a stand mixer you can knead the dough by hand.)
Grease a large bowl and place the dough in the bowl. Cover the dough with a cloth and place the bowl in a warm place for the dough to rise. Allow the dough to rise until it is double in size.
Shape dough into two loaves and place them in greased 8x4" bread pans. Cover the dough and let them rise in a warm place for another 20 minutes or until they have a nice rise to them.
Bake at 350 degrees for 30-35 minutes.
For the softest crust, brush the top of the loaves with butter while they are still warm.