Prepare your corn husks by boiling them in water for 45 minutes.
Drain and cover with a damp towel. Set aside.
In a large pot, season chicken with salt and cover with water. Boil the chicken on medium-high heat, keeping it at a high boil for one minute, before reducing the heat to a simmer and leaving covered for 25 minutes. Drain and shred chicken.
While cooking the chicken, place tomatillo and serrano peppers in a separate pot. Cover with water to boil until tomatillos are soft and change color, about 3-4 minutes.
In a blender, combine tomatillo and serrano peppers, onion, garlic, and cilantro. Blend into a smooth texture.
In a saucepan, heat butter and add tomatillo sauce. Cook on medium heat for about 4 minutes, until the sauce is somewhat thickened.
Combine shredded chicken with the tomatillo sauce.
Make your masa. In a large bowl, beat leftover butter until it is a creamy consistency. Add masa harina, baking powder, chicken brother, and salt to the large bowl, mixing until combined. It should be a consistency similar to cookie dough.
You can test if the masa is ready by dropping a small rolled ball of it into cold water. It will float when it is ready. If it sinks, beat the mixture more to add more air.
Assemble your tamales. You will need either a large, wide corn husk or, if the husks are smaller or narrower, use two.
Spread 2 tablespoons of the masa onto the husk, leaving about ½ inch of room at the top and more at the bottom- about 2 inches.
Take the sides, fold them together, and then fold the bottom of the husk up and over the seam of the two folded sides.
Repeat this until it is no longer possible to do so.
Using a steamer or a steamer insert in a pan, fill the pan with water just below the steam line.
Boil water and add tamales, with the open side pointing up. Cook for about one hour.
Once done cooking, let rest at room temperature for 10-15 minutes.
Finally, assemble your Torte de Tamal by slicing your bolillo roll lengthwise. Remove your tamale from the corn husk and place it inside the bolillo. Enjoy!