When the term "milkshake" was first used in 1885, milkshakes were an alcoholic drink used as a healthy tonic. By the early 1900 it had evolved to include ice cream. By the 1930s, milkshakes were a popular drink at drug stores and diners where kids would hang out after school.
Using a blender or milkshake machine, blend all ingredients together until smooth.
Serve in tall glasses with a straw. Serves 2
For the shake:
1 roasted pineapple
1 cup pineapple juice
1/2 pint vanilla ice cream
Club soda or seltzer, to taste