Mix the Dough:
In a large bowl, combine flour, yeast, and salt. In a separate bowl, whisk together sweetened condensed milk, milk, eggs, melted butter, and vanilla extract. Gradually add the wet mixture to the dry ingredients, stirring until a sticky dough forms.

Knead the Dough:
Transfer the dough to a floured surface and knead for 8-10 minutes until smooth.

First Rise:
Place the dough in a greased bowl, cover, and let rise in a warm place for 1-2 hours or until doubled in size.

Shape the Dough:
Punch down the dough, shape it into a loaf, and place it in a greased loaf pan.

Second Rise:
Cover and let the dough rise for another 30-45 minutes.

Bake:
Preheat the oven to 350°F (175°C) and bake for 25-30 minutes, or until golden brown and the internal temperature reaches 190°F (88°C).

Optional Glaze:
While the bread cools, mix melted butter, sugar, and cinnamon for the glaze. Brush it over the top of the loaf for extra sweetness and shine.

Serve:
Allow the bread to cool slightly before slicing. Serve plain, toasted, or as French toast.