Twice Baked Potatoes | Grandma Nancy's Cookbook | Umami

Ingredients

• 6 large russet potatoes, scrubbed clean
• 1 tbsp. extra-virgin olive oil
• Kosher salt
• 1/2 c. (1 stick) butter, softened
• 1/2 c. milk
• 1/2 c. sour cream
• 1 1/2 c. shredded Cheddar, divided
• 2 green onions, thinly sliced, plus more for garnish
• Freshly ground black pepper