Preheat the oven to 375°F. Combine the cassava flour, baking powder, and salt, mix it until combined.
Mix in the cheeses and the butter. Add the eggs and blend until a soft dough has formed. Add 8 teaspoons of milk and mix well. The dough should be compact and lightly moist; if needed, add one or two more teaspoons of milk.
Form 1.5-inch balls and place them on a greased baking tray, leaving a couple of inches between them.
Bake for 15-16 minutes or until the chipas are slightly browned. Let them cool and enjoy! You can dip them in BBQ sauce.