[knz]

This was the first Google result I found - https://www.vox.com/2014/7/6/5874499/map-heres-how-much-ever...

In 2014 the US was spending ~ 6.5% of household expenditure on food, on the lower end compared to the listed European nations (Germany, France, Italy, and Greece in particular).

There are many other links with a similar premise.

My own travels have taken me to Spain, Denmark, France, Germany, England, Australia, New Zealand, Vietnam, and Canada - other than Vietnam I've always found prices to be comparable or greater than in the US. Obviously the cost is influenced by what you are buying, what is in season, and where you are a shopping. YMMV though!