Beef and Potato Baked Casserole

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Layers of savory ground beef, creamy mashed potatoes, and melted cheddar cheese baked until golden and bubbling, ideal for weeknight dinners. This american-inspired one pot ready in about 55 minutes pairs ground beef, medium onion, garlic for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 400 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. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 25 min Cook: 30 min Serves 6 American cuisine 400 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 375°F (190°C). In a skillet over medium heat, cook 1 lb ground beef, 1 medium onion finely chopped, and 2 cloves garlic minced until beef is browned and onion is translucent, about 8 minutes; drain excess fat and season with salt and pepper.
  2. Step 2: In a bowl, mix 4 cups mashed potatoes, 1/2 cup milk, and 1/4 cup butter until smooth. Stir in 1 tsp dried rosemary and season with salt and pepper.
  3. Step 3: Spread half of the mashed potato mixture (2 cups) in a greased 9x13-inch baking dish. Top with the cooked beef mixture, then cover with the remaining mashed potatoes (2 cups).
  4. Step 4: Sprinkle 1 cup shredded cheddar cheese evenly over the top. Bake for 25-30 minutes until the cheese is melted and edges are golden.

Frequently asked questions

How long does Beef and Potato Baked Casserole take to make?

Total time is about 55 minutes (25 min prep + 30 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 Beef and Potato Baked Casserole?

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 Beef and Potato Baked Casserole?

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 Beef and Potato Baked Casserole 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 Beef and Potato Baked Casserole?

American one pot 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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