This lesson is best followed by The Helmet and How It Protects the Brain, which shows:
Before using the mold, wash the mold with warm soapy water. Rinse it very well, and dry thoroughly. When you are ready to make a mold, coat the inside with a non-stick surface such as PAM® cooking spray or vegetable oil. While any brand of gelatin dessert mix will work, Jell-O® brand seems to have the best selection of colors and flavors to choose from, and so the directions are based on using them.
For the Brain, you will need 3 small boxes (3 oz. each). We recommend watermelon flavor due to the color. To that you may want to add about 12 oz. of evaporated 99.5% skim milk (DO NOT use any other type – the gelatin will not harden properly!) in order to make the brain opaque and give it that grey 'brain' coloration.
Follow the directions on the package to mix the gelatin. You may wish to add food coloring during the mixing process at this point for other effects. If you are using the milk, be sure to reduce the amount of water that you add by the same amount of milk that you are putting in.
You will want to wrap the mold in a towel, and place in a large bowl, pan or baking dish so that it has a solid base to stand in without rolling around. Pour the mixture into the mold, and place the mold in the refrigerator and allow to set up overnight.
In order to remove the brain from the mold, shake the mold lightly to loosen the gelatin from the sides of the mold. Place a large plate upside down over the open end of the mold, and turn over. The brain should slide out on to the plate. If it sticks, you can try dipping the mold briefly into warm water and then try inverting it again.
The mold can also be used for ice cream or ice.
For ice cream: Prepare the mold as above. Then allow the ice cream to soften and spoon into the mold and re-freeze (overnight), then remove using the hot water method as above.
For Ice: Prepare the mold as above. Simply add the liquid of your choice to the mold (don't fill completely as most liquids expand when frozen). Place in the freezer until completely frozen (overnight), and then remove using the hot water method as above.
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