How to Refresh Day-Old Pastries
It happens to the best of us. You buy a gorgeous croissant or a buttery pain au chocolat, life gets in the way, and by the next morning it is sitting on the counter looking a little sad and a little soft. Do not throw it out. With a little bakery magic, you can reheat a croissant and bring it almost all the way back to its fresh-baked glory. Here is how.

The Best Way to Reheat a Croissant
The oven is your friend here. To properly reheat a croissant, preheat your oven to 180 degrees celsius. Place the croissant directly on the oven rack or on a baking tray and warm it for five to eight minutes. What happens in those few minutes is genuinely satisfying: the butter in the layers melts back into life, the exterior crisps back up, and the aroma that fills your kitchen is almost indistinguishable from a fresh bake.
If the croissant is very dry, give the outside a very light mist of water before it goes in. That tiny bit of moisture turns to steam in the oven and helps revive the crumb. For a croissant belfast baked that morning, this trick can genuinely restore something close to the original texture.
A toaster oven or air fryer set to a similar temperature works just as well, sometimes better. The circulating heat in an air fryer is particularly good at crisping the exterior while warming the inside gently.
What Not to Do When You Refresh Pastries
The microwave. Please, not the microwave. A microwave heats from the inside out and turns the layers of a croissant into something dense, chewy and faintly rubbery. All that careful lamination work, all those paper-thin layers, gone in thirty seconds. It is not worth it.
The same goes for a cold croissant straight from the fridge. The fridge is not ideal storage for pastries in the first place: cold temperatures firm the butter and rob the pastry of its character. If you have refrigerated a croissant, bring it to room temperature before you attempt to refresh pastries and then put it in the oven as above.
How to Refresh Other Pastries and Bakes
The oven technique works across most of our viennoiserie and baked goods.
- Pain au chocolat: same method as the croissant. Five to eight minutes at 180 degrees. The chocolate inside will soften and go slightly molten again. Be careful on the first bite.
- Danish pastries: a slightly lower temperature works better here, around 160 to 170 degrees, as the fruit fillings can catch. Four to six minutes is usually enough to refresh pastries with a fruit or cream filling.
- Kouign-amann: this one reheats particularly well. The caramelised sugar base softens back to sticky, glossy perfection at 180 degrees for five minutes.
- Scones and traybakes: a quick warm in a low oven, around 150 degrees for five minutes, revives these beautifully. Serve with proper butter and they are as good as fresh.
Storing Croissants and Pastries Overnight
The best way to make sure a croissant belfast style stays in good condition overnight is to store it at room temperature in a paper bag or a linen cloth. Avoid plastic: it traps moisture and softens the crust. Do not refrigerate. Left at room temperature, a good croissant will still be very refreshable the next morning.
If you need to keep it longer than one day, freeze it. Place it in a zip-lock bag or wrap it tightly in foil and freeze on the day you buy it. To revive from frozen, let it come to room temperature first, then reheat in the oven as above. The result will not be quite the same as the day it was made, but it will still be genuinely good. That is the difference a properly made pastry makes: it comes back from the freezer with far more dignity than something made with shortcuts.
Questions We Get Asked
Can you reheat a croissant more than once?
We would not recommend it. Each reheat draws a little more moisture out of the pastry. One good reheat is excellent. Two starts to dry things out. If you are not going to eat it in the next day or two, freeze it rather than reheating repeatedly.
How long do your croissants stay good?
They are best on the day they are baked, as fresh as you can get them. By the next morning they benefit from a reheat. Beyond two days, freeze rather than wait. We bake in small batches so everything is always sold fresh on the day.
Do you sell day-old pastries at a discount?
We bake small batches and aim to sell out each day. Most days we do. If you want to make sure of your croissant belfast morning, click and collect is the way to guarantee your order.
Order online: Croissant and more on click and collect.
More from the Krumb journal
- How We Laminate Our Croissants
- Our Cruffin: Belfast's Favourite Hybrid Pastry
- How to Store Sourdough So It Lasts
Come and get your pastries fresh from the oven. We are at 258 Ormeau Road, Belfast, open Wednesday to Sunday from 9am to 4pm. Order via click and collect and your treat will be waiting for you, freshly baked and ready to enjoy. And if you do find yourself with a day-old beauty on the counter, now you know exactly how to bring it back to life. Every last krumb deserves a second chance.