Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A comforting layered casserole featuring a rich ground beef and vegetable filling topped with fluffy mashed potatoes baked to golden perfection. This british-inspired beef ready in about 70 minutes pairs ground beef, medium, diced onion, medium, diced carrot for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 calories and feeds 6, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart.

Prep: 20 min Cook: 50 min Serves 6 British cuisine 450 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 400°F. Place 2 lbs peeled and cubed potatoes into a large pot of salted water (1/2 tsp salt) and bring to a boil. Cook for 15-20 minutes until fork-tender, then drain.
  2. Step 2: While potatoes cook, heat 1 tbsp olive oil in a large skillet over medium-high heat. Add 1 diced medium onion and 2 diced medium carrots, sauté for 5 minutes until softened. Add 3 minced garlic cloves and cook for 1 minute until fragrant.
  3. Step 3: Add 1 lb ground beef to the skillet, breaking it up with a spoon. Cook for 6-8 minutes until browned and no longer pink. Sprinkle 2 tbsp all-purpose flour over the beef mixture and stir to combine, cooking for 1 minute.
  4. Step 4: Stir in 2 tbsp tomato paste, 1 cup beef broth, 1 tbsp Worcestershire sauce, 1 cup frozen peas, 1/2 tsp salt, and 1/4 tsp black pepper. Simmer for 5 minutes until sauce thickens and coats the beef and vegetables.
  5. Step 5: Mash drained potatoes with 4 tbsp butter, 1/2 cup milk, remaining 1/2 tsp salt, and 1/4 tsp black pepper until smooth and creamy.
  6. Step 6: Transfer beef mixture to a 9x9-inch baking dish, spreading evenly. Dollop mashed potatoes on top and smooth with a spatula.
  7. Step 7: Bake in preheated oven for 20-25 minutes until the potato topping is golden and slightly crisp on edges. Let rest for 5 minutes before serving.

Frequently asked questions

How long does Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes take to make?

Total time is about 70 minutes (20 min prep + 50 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep ground beef from drying out.

Can I substitute ingredients in Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Oven-Baked Shepherd’s Pie with Savory Ground Beef and Mashed Potatoes?

British beef like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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