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Easy Shepherd’s Pie Casserole – Cozy, Hearty & Perfect for Weeknight Dinners

When you need a dinner that’s comforting, filling, and easy to pull together, shepherd’s pie casserole is the answer. This classic-inspired dish layers savory ground beef, tender vegetables, and rich gravy beneath a fluffy mashed potato topping—all baked together into one cozy, family-friendly casserole. This version is designed for busy weeknights. It uses simple ingredients, minimal prep, and delivers big flavor without extra steps. The beef filling is deeply savory thanks to garlic, onion, tomato paste, and broth, while the mashed potatoes form a creamy, golden topping that seals everything in. If you’re looking for a reliable weeknight dinner that everyone at the table will love, this easy shepherd’s pie casserole is a must-have in your rotation.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 6 servings
Ingredients Equipment Method Notes

Ingredients
  

Beef Filling
  • 1 lb ground beef
  • 1 medium onion diced
  • 2 garlic cloves minced
  • 2 tablespoons tomato paste
  • 1 cup beef broth
  • 1 teaspoon Worcestershire sauce
  • Salt and black pepper to taste
Vegetables
  • 1 cup frozen mixed vegetables
Mashed Potato Topping
  • 3 cups mashed potatoes
  • 2 tablespoons butter
  • ¼ cup cheddar cheese shredded
  • These ingredients create a hearty savory, and perfectly balanced casserole.

Equipment

  • Large skillet
  • Baking dish (medium)
  • Cutting board
  • Sharp knife
  • Wooden spoon or spatula
  • Measuring cups and spoons
  • Oven

Method
 

Step 1:
  1. Preheat the oven to 190°C (375°F). Lightly grease a baking dish and set aside.
Step 2:
  1. Heat a large skillet over medium heat and add the ground beef.
Step 3:
  1. Cook the beef for 6–8 minutes, breaking it apart, until fully browned.
Step 4:
  1. Add the diced onion to the skillet and cook for 3–4 minutes until softened.
Step 5:
  1. Stir in the minced garlic and cook for 30 seconds until fragrant.
Step 6:
  1. Add the tomato paste and stir well, cooking for 1–2 minutes to deepen the flavor.
Step 7:
  1. Pour in the beef broth and Worcestershire sauce. Stir to combine.
Step 8:
  1. Season with salt and black pepper to taste.
Step 9:
  1. Add the frozen mixed vegetables and stir evenly into the beef mixture.
Step 10:
  1. Let the mixture simmer for 5–7 minutes, until slightly thickened.
Step 11:
  1. Transfer the beef and vegetable mixture evenly into the prepared baking dish.
Step 12:
  1. In a separate bowl, warm the mashed potatoes and stir in the butter until smooth.
Step 13:
  1. Spread the mashed potatoes evenly over the beef layer.
Step 14:
  1. Sprinkle the shredded cheddar cheese evenly over the mashed potatoes.
Step 15:
  1. Bake uncovered for 20–25 minutes, until the casserole is bubbling and the top is lightly golden.
Step 16:
  1. Remove from the oven and let rest for 5 minutes before serving.

Notes

🧊 Storage & Reheating
Refrigerator:
Store leftovers in an airtight container for up to 4 days.
Freezer:
Freeze the baked casserole for up to 2 months.
Reheating:
Reheat in the oven or microwave until warmed through. Add a small splash of broth if needed.
🥄 Variations
Extra cheesy: Add more cheddar on top
Creamier potatoes: Mix a little extra butter into the mash
Vegetable boost: Add peas or corn
Thicker filling: Simmer beef mixture a few extra minutes
Lighter version: Use less cheese on top
These variations keep the heart of shepherd’s pie casserole while letting you adapt it to your taste.
❓ 10 FAQs
Is this traditional shepherd’s pie?
It’s a casserole-style version inspired by the classic.
Can I make it ahead of time?
Yes, assemble and bake when ready.
Can kids eat this?
Yes, it’s mild and family-friendly.
Do I need fresh mashed potatoes?
Homemade works best, but leftovers are fine.
Can I double the recipe?
Yes, use a larger baking dish.
Why cook tomato paste first?
It enhances flavor and removes acidity.
Does this freeze well?
Yes, very well.
What vegetables work best?
Mixed vegetables are quick and easy.
Should I cover while baking?
No, bake uncovered for a golden top.
Is this a full meal?
Yes, it’s hearty and satisfying.
🏁 Conclusion
This easy shepherd’s pie casserole is everything a weeknight dinner should be—simple, filling, and deeply comforting. With savory beef, tender vegetables, and creamy mashed potatoes baked into one dish, it’s a recipe that brings warmth and satisfaction to the table every single time. Easy to make, easy to love, and perfect for busy nights.