Instructions
Step 1: Preheat the oven to 375°F (190°C) and grease a baking dish./n
Step 2: In a skillet over medium heat, cook the ground beef until browned. Drain excess grease./n
Step 3: Season the beef with salt, pepper, garlic powder, and onion powder./n
Step 4: In a saucepan, melt butter and whisk in flour, cooking for 1 minute./n
Step 5: Gradually add milk, whisking until smooth and thickened./n
Step 6: Stir in cheddar and mozzarella cheese until melted and creamy./n
Step 7: Layer half of the sliced potatoes in the baking dish, followed by half of the beef and sauce./n
Step 8: Repeat layers with remaining potatoes, beef, and sauce./n
Step 9: Cover with foil and bake for 40 minutes, then uncover and bake for an additional 15–20 minutes until golden and bubbly./n
Step 10: Let rest for 10 minutes before serving.
Storage and Reheating Tips
Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat in the oven at 350°F (175°C) until warmed through or microwave in short intervals. Add a splash of milk if needed to keep the casserole creamy.
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