Here is the classic recipe as found on the labels of the era:
2 sticks butter, softened
1 1/2 cups sugar
2 eggs
1 tsp. soda
1/2 tsp. salt
1 tsp. vanilla
3 scant cups flour
5 Baby Ruth candy bars, cut up
Cream together softened butter and sugar. Beat in eggs. Add soda, salt, vanilla and flour. Fold in chocolate chips and pecan pieces. Drop teaspoon size dough on ungreased baking sheet. Bake 10 to 12 minutes at 350 degrees. Makes about 6 dozen cookies.
source: lady, that's my skull blog
link: http://www.babyruth.com/
link: Curtiss Candy Company
link: Baby Ruth on Wikipedia