Slow Cooker Buttermilk Mashed Potatoes

Bahan-bahan (10 porsi)

• 5 pounds red potatoes
• 6 tablespoons butter
• 2 teaspoons salt
• 1/4 teaspoon pepper
• 1 teaspoon seasoning salt
• 1 & 1/2 teaspoons parsley
• 4 teaspoons minced garlic (I used the kind in the jar)
• 1/4 teaspoon onion powder
• 1/8 teaspoon cayenne pepper
• 1/8 teaspoon lemon pepper (optional)
• 1 & 1/2 cups buttermilk
• 1/3 cup sour cream
• 1/2 cup buttermilk (plus more to taste)
• parsley (fresh, chopped)
• salt and pepper (to taste)
• 2 tablespoons butter