I have no idea of the origin of this cocktail, or who Allen is or was; but this really is a tasty drink. Basically an Aviation or a Blue Moon minus Creme de Violette in the former or Creme Yvette in the latter. What interested me, is that the ratio of maraschino to lemon juice somehow managed to be in such balance as to virtually replicate the highly floral flavor profile of an Aviation. Try one and see for yourself.
As for why this drink isn’t more well known (as all of the ingredients are fairly easy to obtain); the name “Allen” is pretty bland, whereas “Aviation” lends itself to a kind of daring-do, Amelia Earhart kind of iconography. Imagine sidling up the bar and saying, “Yeah, give me an Allen.” Just doesn’t have the same air of sophistication. In any case, I like this one and will be making it at home on a regular basis, thank you!
1.5 oz gin
0.75 oz maraschino liqueur
0.5 oz lemon juice
Shake with ice and strain into chilled cocktail glass.