Roll fondant into 1/4 inch diameter pieces using palms of hands. You will need three pieces the same length. Lay the pieces side by side, and gently press together at one end to join.
Move the fondant length positioned at the right between the left and middle lengths. Now, position the left length between the middle and right. Continue in this manner until the entire length is braided.
Gently press the three ends together to secure. Attach the braid to cake using decorator brush and water. Moisten area slightly and position, pressing lightly to secure.