In a pot place piloncillo or brown sugar, chocolate, and cinnamon stick.
Add 4 ½ cups of water and bring to a boil over medium-low heat.
Simmer for about 7 minutes while stirring constantly to dissolve chocolate and piloncillo.
Add masa harina to the remaining water in a cup and mix to combine.
Slowly and while stirring, pour in the masa harina mixture into the pot.
Allow to simmer for 10 minutes while mixing with a wooden spoon. Do not leave the pot unattended.
Once the mixture has thickened, taste for sweetness and add more sugar/piloncillo if you want.
Remove from heat and serve.
NOTES
Never leave the pot unattended. When boiling, the mixture can easily overflow and spill all over your stove (see photo below).
Use dark chocolate, sweetened chocolate can change the taste of this recipe. Also, avoid using milk chocolate.
If you can’t find piloncillo where you live, use packed brown sugar or molasses. Molasses have the closest taste to piloncillo and is the perfect substitute.