Activate the Yeast: In a large mixing bowl, combine the warm milk, instant yeast, and sugar. Let it sit for 5 minutes until foamy.

Mix the Dough Ingredients: Add warm water, whole wheat flour, 3 cups of bread flour, shortening, honey, and salt to the activated yeast mixture. Mix until a shaggy dough forms.

Knead the Dough: Knead the dough on low speed for about 4 minutes. Add more flour if too sticky to achieve a soft texture.

First Rise: Shape dough into a ball, cover, and let rise in a warm place for about 1 hour until doubled in size.

Shape the Loaves: Turn dough onto a floured surface, knead gently, and divide into halves for two loaves.

Second Rise: Cover shaped loaves and let them rise for another 30 minutes.

Preheat the Oven: While loaves are rising, preheat your oven to 350°F (175°C).

Bake the Bread: Brush loaves with egg wash, bake for about 30 minutes until internal temperature is 190°F (88°C).

Cool and Slice: Allow loaves to cool in pans for 10 minutes, then transfer to a rack to cool completely before slicing.