Ingredients

• 2 1/4 pounds russet potatoes, peeled, cut into 1 1/2-inch pieces
• 8 tablespoons (1 stick) butter
• 2 large onions, chopped
• 2 large garlic cloves, chopped
• 6 tablespoons (or more) milk

Instructions

1. Cook potatoes in pot of boiling salted water until tender, about 15 minutes.
2. Meanwhile, melt 2 tablespoons butter in heavy large skillet over high heat. Add onions; sauté until golden, about 8 minutes. Add garlic; saut$amp;eacute; 30 seconds.
3. Drain potatoes; return to same pot. Stir over low heat until potatoes appear dry. Transfer to bowl; add 6 tablespoons milk and 6 tablespoons butter. Using electric mixer, beat potatoes until smooth, adding more milk, if desired. Add onion mixture; beat just until blended. Season to taste with salt and pepper.