Basic Mashed Potatoes Recipe

Ingredients (8)

• 6-8 medium potatoes
• 1/3 chives
• 1/2 c Parmesan cheese
• 2/3 c white sharp cheddar cheese
• 1 egg yolk
• 3 1/2 tsp salt
• 1 1/2 tsp ground pepper
• 3 Tbsp unsalted butter