salty chihuahua

• coarse salt ~ optional
• 4 ounces tequila, divided
• 2 ounces orange-flavored liqueur, such as Cointreau, divided
• 3 cups grapefruit juice, divided
• 4 grapefruit slices, for garnish

Wet the rims of 4 glasses and coat with coarse salt (if desired); fill the glasses with ice. Pour 1 ounce tequila and 1/2 ounce liqueur into each. Top each with 3/4 cup grapefruit juice and stir. Garnish with a slice of grapefruit.