Bakers Greggs has warned prices on its most popular items such as sausage rolls and steak bakes could rise as raw material costs soar - with more costs set to increase.
The high street chain, which has more than 2,000 stores nationwide, saw profits soar during lockdown as Brits ordered from home in their millions.
But the joy has been short-lived as Russia ’s invasion of Ukraine could prompt price hikes.
As a result, Brits could be hit harder in the wallet as they buy lunches.
CEO Roger Whiteside said: “All the proteins, all the cereals, all the oils - everything's going up in price.
“As ever, we will work to mitigate the impact of this on customers.
"However, given this dynamic, we do not currently expect material profit progression in the year ahead.
“We'll keep things under review as the market develops.”
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Ukraine is one of the world’s top producers of everyday items used for supermarket essentials such as wheat, barley and some oils used for cooking.
Farmers have left their fields to join the war effort - with several videos shared online of them towing ruined tanks.
This means material supplies reaching other countries is set to plummet.
Russia is another of the world’s top exporters of wheat but with the West digging in with heavy sanctions, there are concerns as to how much could be supplied worldwide.
Fish supplies could also be hit as a result of the ongoing conflict.
Everyday items in people’s fridges and cupboards will also go up in price because of the war, adding to existing concerns of the cost of living crisis.
Struggling Brits could soon see the price of bread and cereal soar.
Other impacted items are likely to include coffee, sugar, cheese and milk - owing to companies having to pay more for fuel because of the price of oil going up.
Last month, Allied Bakeries-owner Associated British Foods, owner of favourite brands such as Kingsmill, Ryvita, Silver Spoon and Twinings, warned it could also be impacted by the higher price of wheat.
A spokesman said last week: “Actions on price inevitably lag input cost inflation.”
One of the world’s largest fertiliser firms, Yara International, said costs are being driven up by the invasion.
President Svein Tore Holsether told the BBC : “Things are changing by the hour.
“We were already in a difficult situation before the war...and now it's additional disruption to the supply chains and we're getting close to the most important part of this season for the Northern hemisphere, where a lot of fertiliser needs to move on and that will quite likely be impacted.
“For me, it's not whether we are moving into a global food crisis - it's how large the crisis will be.”
The invasion of Russia into Ukraine has pushed up prices of fuel with some Brits seeing petrol costing £2-a-litre in places.
UK food producers could also be hit down by rising costs for items such as tinned cans and packaging.
