Chocolate hearts aren't for everybody...
Step 1: Form Mold
Make Wooden Frame
Cut two 3.5" wood strips
Cut two 5" wood strips
tape all pieces together. Tape the last corner with a tab of duct tape to use as a clasp (you will need to attach and remove it for each batch)
Silicone Putty Set Up
Measure out equal parts of silicone putty components and mix according to instructions
Spread out evenly in the frame
Place hex nuts
Wait 10 minutes
Remove nuts from mold. This can be tricky since you will have to unscrew them off the silicone.
Cut each section in half. Trying to unscrew less-than-solid pieces can result in accidental cracking.
To make filled chocolate, cut out middle piece of silicone and sand to even out both sides.
I also made a smaller mold with different size nuts...and a wing nut : )