Momma's Slaw

Slaw:

• 2 to 3 pounds green cabbage, shredded
• 1/2 cup shredded carrots 
• 1 small or 1/2 large red onion, quartered and thinly sliced

Dressing:

• 1 1/2 cups mayonnaise
• 6 tablespoons buttermilk 
• 6 tablespoons Momma's Dry Rub, recipe follows, or your favorite barbecue rub (see Cook's Note)
• 6 tablespoons distilled white vinegar 
• 6 tablespoons buttermilk 2 tablespoons sugar 
• Kosher salt

Momma's Dry Rub:

• 1 pound brown sugar (light or dark)
• 3 ounces cornstarch
• 1 cup paprika
• 1 cup garlic salt 
• 1 cup seasoned salt 
• 1 cup granulated sugar
• 1/2 cup chili powder
• 1/4 cup ground black pepper 
• 1/4 cup ground white pepper 
• 2 teaspoons ground allspice 
• 2 teaspoons ground cayenne 
• 2 teaspoons ground cumin 
• 2 teaspoons mustard powder