Step 1:
The paper is about 19x19 centimeters.
Prefold in half over both lines.

Step 8:
This is the other side of the model.
Fold over the prefolded lines.

Step 6:
Fold over the prefolded lines.

Step 11:
Glue these edges together, if necessary.

Step 10:
Fold these three edges upwards too.

Step 9:
Fold this edge straight upwards.

Step 5:
Repeat steps 2 to 4 in this direction.

Step 7:
Fold over the prefolded lines

Step 3:
Fold both edges to the centerline.

Step 2:
Fold both edges to the centerline.

Step 4:
Fold to the centerline one more time, then unfold the model.

Step 12:
Mountain-fold on each corner.

Step 13:
Fold the corners downwards.
And fold the edges downwards, see next picture.

Photos: Making Waffle Cookies with a Waffle Iron

Ready!