Leftover Mashed Potato Pancakes

Ingredients (6)

• + 2 cups mashed potatoes add to pantry
• + 1 egg add to pantry
• + 1 teaspoon ground black pepper add to pantry
• ✓ ¼ cup dry bread crumbs, or as needed
• + 1 tablespoon oil add to pantry
• + 1 tablespoon butter add to pantry