Weekly grocery list for a family of 4

A family of four is not two couples

The classic mistake when scaling a grocery list is doubling everything. In practice, three groups behave very differently.

Breakfast and packed lunches more than double once kids are involved — milk, cereal, fruit and bread go fastest. Dinner protein grows less than you would expect, because kid portions are smaller. And pantry staples barely move week to week: you buy the large size and it lasts a month.

Where the total actually goes

The gap between a $175 week and a $230 week almost always comes down to the same three categories.

• Snacks: the one category that grows without anyone deciding to grow it. Put a fixed quantity on the list and it stops.
• Pre-cut and pre-packaged produce: convenience costs two to three times the whole version of the same vegetable.
• Small meat packs: a whole chicken runs well under the per-pound price of boneless breast, and it stretches across two dinners.

Cook once, eat twice

Three items on this list are chosen specifically because they carry two meals. Ground beef covers taco night and pasta sauce. A whole chicken covers a roast dinner and then soup or quesadillas from the leftovers. A pot of rice covers a side and then fried rice.

That is what makes a weekly list survive a work week: it does not need you to cook from scratch every night, it needs one afternoon.