Wagner Estate Grand Margarita

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Wagner Estate in Greenville, Texas in 1984.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 ounce tequila
 * 1 ounce Grand Marnier
 * 1 ounce fresh lime juice
 * 1 teaspoon sugar

Directions

 * 1) Add all to blender with crushed ice.
 * 2) Serve in frosted glass.