Sealed in a vault in Toronto, the only place the Caramilk bar is made, the 44 year old secret is carefully guarded and protected so the mystery can continue. Caramilk is a proud “made in Canada” story, yet it's a mystery as to when it was first created. What is known is that the Secret was developed in 1968. Today there are hundreds of online urban myths about the Caramilk Secret to get the soft flowing caramel into those delicious bars of chocolate. The secret is safe and sound, locked away in a secure vault within the Gladstone chocolate factory located in Toronto, Ontario.