We Reheated One Chicken Pie Five Ways

A chicken pie straight from the bakery is a perfect machine. Crisp lid, sturdy base, hot gravy, everything in balance. A night in the fridge throws all of that out of tune, and reheating is the job of tuning it back. This experiment started because five people in our crew swore by five different appliances, and nobody would back down.

Why does a chicken pie go soft in the fridge?

A chilled chicken pie is not just a cold version of a fresh one. Three slow changes happen overnight.

1. Water moves. The filling is wet and the pastry is dry, and water always drifts from wet to dry. By morning the underside of the lid and the top of the base have soaked up moisture from the gravy.
2. Fat sets. The fat that made the pastry flaky turns firm and waxy in the cold. Cold pastry tastes greasy because that fat is no longer melting on your tongue.
3. Starch firms up. Cooked starch in the pastry, the potato and the gravy slowly re-crystallises as it cools. Bakers call this staling. The potato goes dense and the gravy turns into a jelly.

So a good reheat has three jobs: get the centre safely hot, drive the extra water back out of the pastry, and melt the fat again so the layers separate. Every method we tried is good at some of those jobs and bad at others.

What does each appliance actually do to a pie?

The five methods heat the pie in very different ways, which explains almost everything we saw on the cutting board.

Method	How the heat arrives	Crust	Centre	Attention needed
Oven	Hot still air plus radiant heat from the walls	Crisp and even	Hot, slowly	Low, but slow
Air fryer	Hot air blown hard by a fan	Crispest lid, darker crimp	Hot, quickly	Medium: watch the edge
Toaster oven	Radiant heat from elements very close to the pie	Browns fast, top first	Lags behind the lid	High: foil tent needed
Microwave only	Microwaves heat the water inside the filling	Soft and steamy	Hot, unevenly	Medium: bursts and rests
Microwave then crisp	Microwave for the inside, dry heat for the outside	Mostly crisp	Hot, quickly	Medium: two machines

The pattern is simple once you see it. Dry heat works from the outside in, so it is brilliant at pastry and patient with the centre. The microwave works from the inside out, so it is brilliant at the centre and terrible at pastry, because a wet surface cannot get much hotter than the boiling point of water and never browns. Combining the two is just giving each machine the half of the job it is good at.

Why did the toaster oven brown so fast?

A toaster oven has its elements a few centimetres from the food. Radiant heat drops off sharply with distance, so the lid of a pie gets blasted while the filling in the middle barely notices. A loose foil tent reflects most of that heat away from the top and lets the centre catch up. In an HDB kitchen without a full oven, the toaster oven is still a perfectly good pie tool: just treat the foil as compulsory.

Why did the microwave pie feel leathery?

Steam from the hot filling pushes up into the lid, and the air inside a microwave stays cool, so that steam condenses inside the pastry instead of escaping. Gluten and starch that get soaked and then cooled turn chewy. We go deeper into this, and how to undo it, in our microwave chicken pie rescue experiment.

What is the maker’s guidance, and what is ours?

Some of the settings above come straight from the people who bake the Don chicken pie, and some are general kitchen practice. Here is the split, so you know whose advice you are following.

• The maker’s guidance: eat within 4 hours of purchase for best results; chill for up to 3 days; air fryer at 150C for 5 minutes then 200C for 5 minutes (current FAQ); oven at 150-180C for 20-30 minutes (the maker’s older reheating blog).
• General food practice and our own suggestions: the toaster oven setting, the microwave bursts, the microwave-then-crisp combo, and the foil tent.

The maker’s air fryer setting is short and sharp, which suits a pie bought the same day. From the fridge, we found it needed a little extra time at the lower temperature before the centre was properly hot. The full breakdown of that is in our air fryer chicken pie settings test.

How to reproduce this at home

1. Buy or bake pies from the same batch and chill them overnight, covered.
2. Preheat every dry-heat appliance fully before the pie goes in. A cold oven slowly steams a pie before it starts to crisp it.
3. Use the settings in the method above, and treat the times as a starting range. Ovens and air fryers vary a lot.
4. Probe the very centre, where the egg and potato sit, not the gravy near the edge. You want 75C, or piping hot all the way through if you have no thermometer.
5. Rest for 2 minutes, cut in half and compare lid, base and middle side by side.

If you just want the answer for your own appliance and pie size, our chicken pie reheat calculator does the sums and shows the full table.

What would we change next time?

• Add a whole pie. A whole pie has a much deeper centre, so the gap between a browned lid and a lukewarm middle should be far wider. We expect the foil to matter even more.
• Preheat the tray. A tray already hot when the pie lands on it should push heat straight into the base. We suspect this would close most of the gap between oven and air fryer bases.
• Start some pies at room temperature. Plenty of people reheat a pie bought a few hours earlier. That is a different, easier starting point and deserves its own row.

The non-negotiable bit

Whatever method wins your heart, the food-safety rules do not change. Reheat until piping hot all the way through, 75C at the centre if you own a probe. Reheat a pie once only. Microwaves heat unevenly, so rest the pie and check the middle before you bite. And a pie that has spent longer than 2 hours sitting out in Singapore heat belongs in the bin, not the oven. If you are reheating something other than a chicken pie, the wider guide on how to store and reheat pies at Pie Singapore covers fridge and freezer times for the other kinds too.

EXP-01 is one of our chicken pie experiments, run on the Don chicken pie. For the settings without the story, use the chicken pie reheat calculator; for the pie itself, start with the Don chicken pie guide.

Sources we leaned on

• USDA FSIS: Leftovers and food safety
• British Pie Week: How to store, freeze and reheat savoury pies properly
• FoodSafety.gov: Safe minimum internal temperatures