Things you need
Needle
Embroidery thread (I used a six string thread)
Cloth
Scissors
How to do it
Step 1
Pass the thread through the eye of the needle. Double it and knot the ends together.
Step 2
If you are going to embroider a handkerchief-sized cloth or something bigger, you will need an embroidery hoop. Since I am using the stitch on a fabric belt that I wish to make, a hoop does not work out for me. In case you are using an embroidery hoop, fix the cloth on the hoop tightly. Then pass the needle thread through one end of the cloth to the other.
Step 3
While holding the needle close to the cloth wind the thread around it thrice. PS: The number of times you wind the thread around the needle and the kind of thread you are using will decide the size of the knot.
Step 4
Holding the wound end of the thread tightly pass the needle through the cloth. Ensure you are passing it as close as possible to the point from where you and passed the needle in step 2. And pull it tight. PS: Do not pass the needle through the same hole as step 2. If you do it will just get your thread out of the cloth completely.
Step 5
In case you want to make multiple French knots take the same thread to another point on the cloth and repeat step 2 to step 4.
Step 6
When you are done with the knots, ensure that you are on the reverse side of the French knot side of the cloth. Lightly pass the needle through the cloth in such a way that you can not see the thread on the French knot side. Then create a loop and pass the needle and thread through it so that a knot is formed. Pull the thread tightly to ensure it is secure.
(final pic courtesy www.needleandthread.com)