Prepare the Dough: In a large mixing bowl, whisk together flour, sugar, and salt. In a separate bowl, combine sweetened condensed milk, warm milk, and yeast. Let sit for 5 minutes.

Combine Ingredients: Mix wet and dry ingredients with a wooden spoon until shaggy, then add the beaten egg and melted butter. Stir until a coherent dough forms.

Knead the Dough: Turn out dough onto a floured surface and knead for 5-7 minutes until smooth and elastic.

First Rising: Place dough in a greased bowl, cover, and let rise for 30-40 minutes until doubled in size.

Shape the Loaf: Punch down the dough, shape it into a loaf, and place seam-side down in a greased bread pan.

Second Rising: Cover loaf and let rise for another 30 minutes.

Bake: Preheat oven to 350°F (175°C) and bake the loaf for 25-30 minutes until golden brown.

Cool: Let the bread cool in the pan for 10 minutes, then transfer to a wire rack.