Place the millet flour in a medium-sized bowl.

Dampen the millet flour slightly with water.

Form small, lentil-sized balls from the dampened flour by rubbing them around in your hands.

Add water gradually to achieve the right texture for forming balls.

Place the millet flour balls in the top part of a couscoussiere or steamer.

Steam until the millet balls are cooked through, about 20 minutes.

Remove the steamed millet balls and allow them to cool to room temperature.

While the millet balls are cooling, add vanilla sugar and confectioners' sugar to the buttermilk.

Stir well to ensure the sugars are well mixed with the buttermilk.

Place the cooled millet balls in a serving bowl.

Pour the sweetened buttermilk over the millet balls.

Serve the tiakri.