Mix all-purpose flour, bread flour, granulated sugar, dry active yeast, milk powder, kosher salt, and ube powder in a mixing bowl until well combined.

In a separate bowl, combine whole milk, water, large egg, unsalted butter, ube extract, and heavy cream.

Pour the wet mixture into the dry ingredients and mix until a dough forms.

Knead the dough until smooth and elastic.

Place the dough in a greased bowl, cover it, and allow it to rise until doubled in size (about 1-2 hours).

Punch down the dough and shape it into loaf forms.

Place the shaped dough into greased loaf pans.

Cover and let it rise again until doubled.

Preheat the oven and bake the loaves until golden brown (about 40 minutes).

Let the bread cool before slicing.