I saw this on a Simply Quilts episode featuring author Rebecca Wat, who's written a book about adapting origami techniques for fabric and then using them in quilt making. Here is the fold/block she showed us. I think she called it an "inside out flower".
Step 1: Start with a square
Here is a 6" square. Be precise in your measuring whatever size you choose. Just make sure it is square.
Step 2: Fold 1 and 2
Wrong side up, fold your square in half (I think it's called a valley fold), turn and fold again. Finger press the edges as you go and then open it back up. You'll see the fold intersection making a "t" through the center of your square.
Step 3: Folds 3
Opened back into a square, spin the fabric so that it's facing you as a diamond. Fold the points/corners into the center one at a time so that they just touch the center intersection. Finger crease the edges.
Step 4: Turn it over
Turn your square over keeping the triangle folds folded and underneath. With right side up turn it so it's sitting in front of you as a square rather than a diamond again.
Step 5: Fold again
Now fold edges in a valley fold up to the center point. Crease as you go all around the square.
Step 6: Making the ears
Now here's the tricky part, or at least it's trick to try to explain. You take on corner and fold it up like a little ear. The way I think of it is to take two perpendicular sides and valley fold them toward the center. This make the ear naturally.
Step 7: Tacky
Tack that ear in place with matching thread.
Step 8: Four tacked ears
Go around the whole thing creating four ears and tacking each as you go along. Sort of like a crab rangood or a fortune cookie thing. See?
Step 9: Inside Out
Now turn the ears inside out and voila!