For the dough:
2 cups (228g) masa harina, white or yellow
1 teaspoon chicken bouillon granules, optional
1/2 teaspoon salt
1 1/2 to 2 cups boiling water
2 tablespoons (28g) butter or lard, softened
Vegetable oil, for cooking
For the filling:
1 cup shredded mozzarella cheese or Oaxaca cheese
1 cup refried beans, optional
Make the dough:
In a large mixing bowl, mix together the masa harina, chicken bouillon (if using), and salt.
Add the hot water a little bit at a time while mixing the dough with a rubber spatula, making sure no clumps form. Do not add all the water at once as you may not need it all. It will slowly absorb the liquid, so let it rest for a few minutes and, if needed, add some more water. The dough should be the consistency of play dough and slightly sticky.
Mix in the butter. Since the dough will be warm, the butter should incorporate easily. Use your hands or a spatula to make sure it’s distributed evenly through the dough.