Hell, I got 3.5 pounds of steak tips for $20 about a month ago.
My food costs have absolutely gone up, but it's MUCH closer to the "10 percent" figures quoted as inflation than anything close to what you have said. Where do you live and shop?
A lot of cattle was recently liquidated (made into meat products, this year) as grazing fields have been drying up and, due to climate change, meat pipelines have had to start making MAJOR changes.
https://fred.stlouisfed.org/series/APU0000FS1101
So of the two items you cherry-picked to support an assertion that groceries have more than doubled, one is up...around 30-35%. In fact, there doesn't appear to be a single food item in this list that has doubled in the past year. Eggs are the closest.
https://www.bls.gov/regions/mid-atlantic/data/averageretailf...
https://www.ams.usda.gov/mnreports/dywabutter_cme.pdf
https://www.globaldairytrade.info/en/product-results/butter/
But that's not the whole story. Prices are not primarily set by wholesale costs for many goods.
I think cereal has only gone up 30%, although there have been other events that influenced Kellogs pricing (notice how the Poptarts boxes have changed slightly) and then there has been the opportunity to steal away some extra profit - https://www.wxyz.com/news/now-cereal-prices-are-on-the-rise-... (search for "Mills").
