I’ve tried ordering it outside of Texas and get strange looks. I now know why: it’s a Texas creation, and more specifically, it looks like it is an Austin invention.
Cedar Door actually sells Mexican Martini mix and says that their recipe is as follows:
2 oz. Tequila
2 oz. Triple Sec
2.5 oz. Mexican Martini Mix
1 Fresh Squeezed Lime
3 Green Olives
The Austin Chronicle had this version of the Door’s recipe in 2005:
In a 16-oz. shaker full of ice, combine:
1.5 oz. Sauza Gold Tequila
1.5 oz. Hiram Walker Triple Sec
Finish with freshly squeezed lime juice, a splash of orange juice, and sweet and sour.
Shake well and serve in a champagne glass with a salted rim, garnished with three olives on a sword pick and a lime wedge.
Trudy’s doesn’t list their recipe on their site, but I found one claiming to be their’s on Recipezaar.
The local Tex-Mex place here in Leander, Jardin del Rey, makes a wonderful one and I know they do not use Sprite® in their’s like some recipes I found call for. The recipe I found that is closest to Jardin’s is the following:
Fill the shaker half full of ice
2 parts tequila
1 part triple sec or Grand Marnier
a splash of olive juice (from the jar you get the garnish olives from)
a splash of lime juice
roughly 1 part of sweet and sour mix (lemon based), usually less than 1 part, whatever fills up the cocktail shaker
Shake well and serve in a martini glass garnished with a few olives and the martini glass can be rimmed in salt.
So, it appears this uses sweet and sour mix in place of Cedar Door’s Martini Mix. I read elsewhere that Cedar Door’s mix is primarily pure cane sugar, water, and citrus oils.
I’ve also seen a few recipes call for a few dashes of olive juice, but I think the olives in the bottom of the glass will be more than enough saltiness to cut through the sweetness of this drink.