Margarita Sunrise

1                    lime; cut into halves
granulated sugar
3      cups          cracked ice
1/4 cup           powdered sugar
1      cup           tequila
6      ounces        frozen orange juice

Rub rims of 4 stemmed glasses with 1 line half; dip rims of glasses in
granulated sugar. Squeeze juice from both lime halves into blender
container. Add remaining ingredients. Cover and blend on high speed
until foamy.