Alternative options, such as takeaways, were becoming normalised and often people lacked the skill to put basic meals together, she said.
She agreed that convenience also played a factor as people led busy lives.
She recommended people planned ahead and said the Healthy Food Guide's 5pm Panic recipes, which could be prepared in about 15 minutes, were extremely popular.
The Healthy Food Guide had also created simple nutritional recipes that averaged from $3 to $5 per person.
"Some people feel they don't have enough ideas, or variety or recipes up their sleeves ... they need to identify 10 recipes they like and put them in a folder so they can become their staple 10 recipes."
Tauranga Budget Advisory Service manager Diane Bruin said she did not believe the cost of food had "gone up astronomically and if you shop wisely you can still afford to feed your family".
It had not increased its allowance for food in the past 12 months and allocated about $200 per week for an average family of four while swapping out meat on some meals would cut down expenses, she said.
"I think it is more about planning as takeaways have become convenient."
Menulog Survey:
More than half of NZers have ordered takeaways to save money on cooking
More than half spend up to $50 a week on takeaways
Almost a quarter of 45-54-year-olds spend $50 to $100 a week on takeaways
435 New Zealanders surveyed across all regions - source Menulog.co.nz
indulge Speaker Collective: Claire Turnbull is in Tauranga this month as a keynote speaker at the indulge Speaker Collective, in association with Craigs Investment Partners, on October 7 at ASB Arena.
Book your tickets now.
There are still general admission tickets for three indulge events at just $40, which means you get to go to the indulge Speaker Collective, in association with Craigs Investment Partners, on October 7, indulge Bay Model, in association with Blur Eyecare, on October 9, and the indulge Outlet Sale, in association with Aspire Health and Sports, on October 10.