2 cups water
1 cup white corn syrup
3 1/2 cups sugar
1/4 tsp cream of tartar
1/4 tsp vanilla extract
Few drops of desired food coloring
Add all ingredients into heavy pot. Bring the mixture to a voil. Continue stirring it until it reaches 300 degrees F per a candy thermometer.
At 300 degrees pour the "lava" onto a jelly roll pan to cool. Do not lick the spoon!
In about an hour check the firmness of the candy. It should now be a solid sheet of "glass".
All I needed to do was to pick up the pan and release it in the air to have the pieces break. Smashed any pieces that seem too large.