Put whole wheat flour, flour, sugar, salt, and dry yeast into a bowl.
Pour in warm water and milk, then knead the dough.
Add butter and knead until the dough becomes smooth.
Cover the dough with plastic wrap and let it rise for 1 hour.
Place the dough into a bread pan and let it rise a second time.
Bake in a preheated oven at 190°C (374°F) for 30 minutes to finish.