1/2 head green cabbage, finely shredded
1/4 head red cabbage, finely shredded
1 large carrot, grated
1/4 cup onion, finely minced
1/2 cup mayonnaise
1/4 cup buttermilk
2 tablespoons milk
2 tablespoons lemon juice
2 tablespoons sugar
1 tablespoon white vinegar
1/2 teaspoon salt
1/4 teaspoon black pepper
Combine cabbage, carrot, and onion in a large bowl
Whisk mayonnaise, buttermilk, milk, lemon juice, sugar, vinegar, salt, and black pepper until smooth
Pour dressing over vegetables
Toss until evenly coated
Cover and refrigerate for at least 2 hours
Toss again before serving