Orange and tequila go so well together it’s almost criminal. The Mandarin liquor reigns in the sourness of the lime juice a smidge, but it’s still a recognisable margarita, albeit with a sweet citrus edge. This is a very good cocktail.
The bitter is not an option here it gives the meaning to coctktail which is rather flat without bitter.
If you don't have the Margarita bitter which will give a lot of freshness by pronouncing the agave at the expense of the fruity taste, you can put 10 drops of Angostura bitter in it which will give the whole thing more depth (at the expense of the freshness)
Made substituting the mandarin liqueur for M&S Clementine gin liqueur. Great margarita variation which accentuated the smokiness of the Olmeca Altos Plata Tequila I used.