On The Blacklist (new show starring James Spader), Spader's character Raymond Reddington takes FBI agent Elizabeth Keen out for dinner where he surprises her with a deep blue Aviation cocktail. He tells her, "It's from the '20s, tastes like Spring, doesn't it?" The historic cocktail is usually a light purple/blue in color which actually dates back to at least 1911. This is certainly the season for an Aviation cocktail.
2 ounces gin
1 Tbsp freshly squeezed lemon juice
2 tsp maraschino liqueur, preferably Luxardo
1-1/2 tsp Crème de Violette
Lemon twist, for garnish
Combine the first three ingredients in a cocktail shaker filled with ice. Shake to chill well, then strain into a cocktail glass. Drizzle the Crème de Violette into the glass and garnish with a bright lemon twist.