In a mixing bowl, combine the warm milk, sweetened condensed milk, and instant yeast. Stir and let sit for 5 to 10 minutes.

Once the yeast mixture is frothy, add the beaten egg, melted butter, and salt. Stir until fully combined.

Gradually add in the all-purpose flour, one cup at a time, mixing until a soft dough forms.

Turn the dough onto a floured surface and knead for 5 to 7 minutes until smooth and elastic.

Place the kneaded dough in a greased bowl, cover it, and let it rise in a warm area for 30 to 45 minutes.

Punch down the dough, shape it into a loaf, and place it seam-side down in a greased 9x5-inch loaf pan.

Cover the loaf pan and let the dough rise again for about 30 minutes.

Preheat the oven to 350°F (175°C) and bake for 30 to 35 minutes until golden brown.

Remove from oven, cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.