Cut the conchas into thin slices.
Set aside until ready to use.
In a large bowl, add the eggs, vanilla, milk, sweetened condensed milk, and cinnamon.
Whisk everything together.
Set aside.
Butter the sides and bottom of a large baking dish.
Add a layer of the conchas slices.
Top with coconut and raisins.
Add another layer of conchas slices, coconut, and raisins.
Repeat until there are no more slices.
Lastly, top with the crumbles from the conchas topping.
Pour the egg mixture over everything.
With a spatula, press down lightly, making sure everything gets soaked with the egg mixture.
Cover with aluminum foil.
Refrigerate for 20 minutes.
Preheat oven to 350 degrees F.
Bake for 30-35 minutes, or until it sets fully.
Let cool slightly before dusting with powdered sugar.
Enjoy!