In a large pot, bring 4 cups of water to a boil.
Gradually add the cassava flour to the boiling water, stirring continuously to prevent lumps.
Reduce the heat to low and continue to cook the mixture, stirring frequently, until it becomes thick and smooth. This should take about 10-15 minutes.
The mixture will start to pull away from the sides of the pot and become dough-like.
If desired, stir in the palm oil or vegetable oil for additional flavor and richness.
Transfer the fufu to a bowl and let it cool slightly.
Enjoy your meal!