Can I make shepherd's pie ahead of time?
Yes. Assemble the dish, cover, and refrigerate up to 24 hours. Add 10–15 minutes to bake time if baking cold.
What's the difference between shepherd's pie and cottage pie?
Shepherd's pie traditionally uses lamb; cottage pie uses beef. This recipe uses ground beef, making it a cottage pie.
How do I prevent a soggy bottom layer?
Ensure the beef filling is fully cooked and cooled slightly before topping with mashed potatoes. This reduces steam and moisture transfer.
Can I use frozen mashed potatoes?
Yes. Thaw and warm them first, then spread over the filling. Check seasoning, as store-bought versions may already be salted.
How do I know when it's done baking?
The mashed potato topping should be golden brown on top and the filling should bubble slightly at the edges, about 25–30 minutes at 350°F.