Crush the vanilla wafers until finely ground using a food processor or rolling pin.

In a large mixing bowl, combine the crushed vanilla wafers with sweetened condensed milk and finely chopped pecans. Mix until it forms a thick paste.

Divide the mixture in half and shape each portion into logs about two inches in diameter using wax paper or parchment paper.

Wrap each log tightly in wax paper and refrigerate for at least two hours until firm.

Unwrap the logs and slice them into approximately ¼-inch rounds for serving.