Silly Putty Recipe 1 tbsp. White Glue ½ tsp. Epsom Salts ½ tsp. Water In small cup, put ½ tsp. Epsom salts and ½ tsp water. Stir till salt is all or mostly dissolved. Add one tbsp. Glue to another small cup. Add Epsom salt water to the glue and stir. When putty has formed, experiment with it on waxed paper. Store in Ziploc bag.