Shepherd's Pie
"Savory ground beef and vegetables under a thick blanket of creamy mashed potatoes — the Costco deli version in a microwave tray doesn't hold a candle to this one straight from your oven."
Costco Copycat — This is a homemade version of the Costco Deli & Prepared Foods item. See it in store →
The Game Plan
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Preheat oven to 400°F (200°C).
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Peel and cube potatoes. Boil in salted water until fork-tender, about 15 minutes. Drain, then mash with butter, milk, and half the cheddar. Season with salt and pepper.
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While potatoes cook, brown ground beef in a large oven-safe skillet over medium-high heat. Drain excess fat.
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Add onion and cook 3-4 minutes. Add garlic, tomato paste, thyme, and flour. Stir for 1 minute.
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Pour in beef broth and Worcestershire sauce. Simmer 5 minutes until thickened. Stir in frozen vegetables and cook 2 minutes more. Season with salt and pepper.
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Spread mashed potatoes evenly over the meat filling. Use a fork to create ridges on top (they get crispy). Sprinkle with remaining cheddar.
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Bake 20-25 minutes until the top is golden and the edges are bubbling.
