Peel the yuca and cut it into small pieces.

Place the yuca pieces in a pressure cooker and add enough water to cover them.

Once the yuca pieces are cooked, transfer them to a food processor with the cooking water.

Blend until you get a sticky dough, then transfer to a plate.

Add the egg, two tablespoons of butter, and a pinch of salt to the mashed yuca.

Slowly add all-purpose flour, mixing by hand, until the mixture has a dough-like consistency.