Step 1:
The Origami paper is 15x15 centimeters and black on one side.
Prefold in half

Step 8:
Slide the right part into the left opening, see arrow

Step 6:
Fold over these two lines.

Step 13:
Repeat steps 9 to 12 on the other side of the cookie.

Step 12:
Press the surface flat on a table or between your fingers

Step 11:
Fold the edge downwards on about 5 more spots.

Step 10:
Fold this spot downwards

Step 9:
Fold this spot downwards.

Step 5:
Fold both edges just a little off the centerline

Step 7:
Prefold over both lines.

Step 3:
Fold the edges to the prefolded lines.

Step 2:
Prefold the edges to the centerline

Step 4:
Fold over these two lines

DONE!
This is a DIY-video for making the Oreo cookies: