I have to repost this recipe as today is National Margarita Day! As you can see by the title these are my favorite Margaritas. The pineapple juice cuts the sour of the lime and sweetens the drink perfectly. If there is any extra just freeze it, it doesn't freeze solid because of the liquor and it's ready for you whenever you want a margarita. Happy National Margarita Day!
Ingredients: tequila, triple sec, limeade, pineapple juice and ice
If you want salt, use a lime slice and go around glass rim to moisten and dip in salt (kosher).
Blend all the ingredients in blender and serve. 
Ingredients:
12 ounces Frozen limeade concentrate, undiluted
3/4 cup Tequila (Jose Cuervo)
1/4 cup Triple Sec
6oz can Dole pineapple juice
Ice cubes
Lime slices
Directions:
Rub rim of cocktail glass with wedge of lime. Place salt (I like to mix salt and sugar) in saucer; spin rim of each glass in salt (Optional). Set prepared glasses aside. Combine limeade concentrate, tequila, and Triple Sec and pineapple juice in container of an electric blender. Add enough ice cubes to fill blender; blend well. Pour beverage into prepared glasses; garnish with a slice of lime, if desired.
Rub rim of cocktail glass with wedge of lime. Place salt (I like to mix salt and sugar) in saucer; spin rim of each glass in salt (Optional). Set prepared glasses aside. Combine limeade concentrate, tequila, and Triple Sec and pineapple juice in container of an electric blender. Add enough ice cubes to fill blender; blend well. Pour beverage into prepared glasses; garnish with a slice of lime, if desired.