In 1939 Mildred Day and a co-worker perfected a new recipe using cereal, butter, and marshmallows. This treat would become known as the Rice Krispies Treat, and recipes featuring the snack were put on cereal boxes in 1941.
In 1939 Mildred Day and a co-worker perfected a new recipe using cereal, butter, and marshmallows. This treat would become known as the Rice Krispies Treat, and recipes featuring the snack were put on cereal boxes in 1941.
In 1939 Mildred Day and a co-worker perfected a new recipe using cereal, butter, and marshmallows. This treat would become known as the Rice Krispies Treat, and recipes featuring the snack were put on cereal boxes in 1941.