Classic Beef Cottage Pie with Crispy Potato Mash

Classic Beef Cottage Pie with Crispy Potato Mash combines a thick beef and vegetable gravy with a fluffy mashed potato crust. The thick stovetop gravy and an overnight chill stop the layers from mixing when you bake the pie at 350°F (180°C).

The beef filling

A true Classic Beef Cottage Pie with Crispy Potato Mash requires ground beef, whereas a shepherd's pie relies on lamb. You can easily substitute ground pork, chicken, turkey, or lamb for the beef. Carrots and celery form a traditional mirepoix flavor base for the filling. If you omit these vegetables, stir one teaspoon of sugar into the pan to compensate. You can mix chopped zucchini or peas into the sauce, but you will need to scale back the beef to ensure the mixture fits inside your baking dish.

Warm olive oil in a large skillet over medium high heat. Cook the finely chopped onion and minced garlic for one minute. Stir in the chopped carrots and celery. Cook the mixture for three minutes until the vegetables become soft and sweet. Turn the stove to high heat and add the ground beef. Break the meat into small pieces as it browns. Mix all-purpose flour into the beef and vegetables.

Stir in tomato paste, low-sodium beef stock, red wine, Worcestershire sauce, and a crumbled beef bouillon cube. Add dried thyme, bay leaves, salt, and black pepper. Bring the mixture to a simmer. Turn the heat down once the liquid bubbles rapidly. Let the beef simmer for 30 minutes. Simmer the liquid on the stovetop until it looks like a thick gravy. The sauce does not thicken further in the oven. If you take the pan off the heat too soon, the pie will have a watery sauce after baking. Taste a spoonful of the filling and add a little more salt if you need it.

Assembly

Transfer the beef mixture to a 6-cup (1.5-quart / 1.5-liter) baking dish. Chill the meat mixture overnight to give the potatoes a firm base. A cold filling stops the hot mash from sinking or bleeding into the meat sauce.

Potato Topping

Peel the potatoes and cut them into 1-inch (2.5 cm) cubes. Boil the potatoes in a pot of water for 15 minutes until soft, then drain them. Return the potatoes to the empty pot and shake it for about 30 seconds. The residual heat steams the potatoes dry. If you skip this step, excess water stays in the potatoes and drops into the meat filling during baking.

Mash the potatoes with warm milk, butter, and salt. You can drizzle olive oil over the potatoes instead of using melted butter. Always spread the mashed potatoes while they are hot. Cold potatoes turn hard and become very difficult to spread in an even layer.

Spoon the mashed potatoes onto the chilled beef filling and spread them into an even layer. Drag a fork across the surface of the hot potatoes. The tines create ridges and peaks that catch the oven heat and turn brown.

Crispy Parmesan Crust

Sprinkle grated parmesan cheese over the rough potato surface. Any melting cheese can replace the parmesan here. Drizzle melted butter and olive oil across the top to help the crust turn golden and crispy. Bake the pie for 25 to 30 minutes.

Make-ahead storage

You can build the pie in a single baking dish or divide it into individual ramekins. The assembled, unbaked pie stays fresh in the refrigerator for up to four days. You can also freeze the unbaked pie for up to three months. If you bake it straight from the freezer, cover the dish for the first 45 minutes to prevent uneven cooking.

Resting and serving

Pull the dish from the oven when the top is golden and the edges bubble. Poke the center with a knife to check that the middle is steaming hot. Turn off the oven.

Let the baked pie rest for five minutes before you scoop it.

Sprinkle fresh thyme leaves over the hot crust. Serve the pie alongside a fresh green salad or roasted winter vegetables.