Baked Shepherd’s Pie with Savory Mushroom and Ground Beef

By AislePrompt Editorial · Published 2026-05-08 · Updated 2026-05-08

A comforting baked shepherd’s pie featuring a rich ground beef and mushroom filling topped with creamy mashed potatoes browned to perfection. This British-inspired beef recipe, ready in about 60 minutes, layers ground beef, button mushrooms, yellow onion into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 520 calories and feeds 4, so it slots into a weekend bake or a special-occasion dessert tray. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 1 lb ground beef
• 8 oz, sliced button mushrooms
• 1 medium, diced yellow onion
• 2 medium, diced carrots
• 3, minced garlic cloves
• 2 tbsp tomato paste
• 1 cup beef broth
• 1 tbsp Worcestershire sauce
• 1 cup frozen peas
• 2 large, peeled and quartered russet potatoes
• 4 tbsp butter
• 1/2 cup milk
• 2 tbsp olive oil
• to taste salt
• to taste black pepper
• 1 tsp, chopped fresh thyme

The pan we’d use for this → Best Nonstick Cookware for 2026: Top 5 Skillet Picks + Buying Guide

Instructions

1. Step 1: Preheat oven to 400°F. Place 2 large peeled and quartered russet potatoes in a large pot of salted water and boil for 15-20 minutes until fork-tender.
2. Step 2: While potatoes cook, heat 2 tbsp olive oil in a large skillet over medium-high heat. Add 1 medium diced yellow onion and 2 diced carrots, sauté for 5 minutes until softened.
3. Step 3: Add 3 minced garlic cloves and 8 oz sliced button mushrooms to the skillet, cooking for 4 minutes until mushrooms release moisture and begin to brown.
4. Step 4: Stir in 1 lb ground beef, breaking it apart with a spatula, and cook until no longer pink, about 6 minutes. Season with salt, black pepper, and 1 tsp chopped fresh thyme.
5. Step 5: Mix in 2 tbsp tomato paste, 1 cup beef broth, and 1 tbsp Worcestershire sauce. Simmer for 8 minutes until sauce thickens slightly. Stir in 1 cup frozen peas and cook 2 more minutes.
6. Step 6: Drain potatoes and return to pot. Add 4 tbsp butter and 1/2 cup milk, mashing until smooth and creamy. Season with salt and pepper to taste.
7. Step 7: Spread the meat mixture evenly into a 9-inch baking dish. Dollop mashed potatoes on top and spread evenly, creating texture with a fork.
8. Step 8: Bake uncovered for 20 minutes until the potato topping is golden and edges are bubbling. Let rest 5 minutes before serving.