Start by pre-heating the oven to 350 degrees Fahrenheit. Next, take the bread and cut it into small pieces and put them in a large bowl. After that, you will add the whole milk and evaporated milk to the bowl with the bread and mix it with a large spoon, letting it soak for about 15 minutes.
After 15 minutes have passed, you will mash the bread and milk mixture with a potato masher to get a smooth, soft consistency and then set it aside.
Melt 3/4 stick of the butter in the microwave, setting aside the remaining 1/4 stick to prepare the baking dish.
Add the melted butter to the bread and milk combination and mix well.
Mix in the eggs until everything is perfectly incorporated. Immediately after, add the cinnamon, vanilla (esencia de vainilla), sweetened condensed milk, and mix well before mixing in the raisins.
Prepare the bread pan by greasing it with the remaining butter, ensuring that the entire surface is covered with the butter.
Add the mixture and bake for 45 minutes or until a toothpick can be inserted and comes out clean.
Let the budin de pan cool for a short time at room temperature until you can remove it from the baking pan. Cut into slices and serve with hot chocolate for a delicious bread dessert.