What candy bar was originally packaged to include three separate pieces of flavored vanilla chocolate and strawberry?

The candy bar you're thinking of is the Three Musketeers.

Originally, it was indeed packaged with three separate pieces:

* Vanilla Chocolate: The biggest piece, a standard milk chocolate.

* Strawberry: A pink, strawberry-flavored piece.

* Chocolate: A darker chocolate piece.

However, the strawberry piece was discontinued in 1979, leaving the bar with just vanilla and chocolate.