1 oz fresh-squeezed, strained lemon juice
1 oz fresh-squeezed, strained lime juice
2 oz simple syrup
2 oz premium tequila
1 oz Grand Marnier or Cointreau
Fill a cocktail shaker three-quarters full with ice and add listed ingredients. Shake and strain into a pre-chilled margarita or martini glass.
Gomers has Milagro Silver Tequila on sale for about $25.
Costco has the best price on Grand Marnier for $35.
OXO has a good, inexpensive juicer.
You can store lemon juice, lime juice, and simple syrup in the fridge in glass bottles.