Making butter was a long process in the 1960s. Milk cans were used to collect milk from cows, with the cream skimmed off and churned into butter using a plunger churn. The milk was poured into the churn and mixed for a long time until clumps of butter formed. Utensils were sterilized through a process called scalding with boiling water. A video shows milk being churned into butter in a plunger churn, demonstrating how butter was made on farms in the 1950s and 1960s.