This recipe makes a tall margarita aka double so if you don't want a large margarita half the recipe.
Squeeze lemon and lime juice in a glass or bowl. Set aside.
Fill a glass with ice.
Pour the shots of tequila and triple sec/cointreau in the glass with ice.
Add the lemon and lime juice into the alcohol glass.
Top off with Fresca. (If you want it a little sweeter add a dash of agave syrup. I have made it both ways and they both are delicious. I would start with not adding it and then add it in if the margarita is too tart for you.)
Mix.
Enjoy!