Costco is known for its low prices. Yet, a shopping expert points out that not all grocery deals are the best here.

Su-Jit Lin, a food writer and Costco fan, notes in Eating Well that some items are cheaper elsewhere. This is especially true if you don't need to buy in bulk.

For instance, Lin mentions that milk can be bought for less at Lidl, Aldi, or Target. While Costco sells milk for $4 a gallon, it can be found for under $3 at these stores.

Sandwich bread is another item better purchased at supermarkets like Publix or Krogers. They offer "buy one, get one" deals on premium bread brands, without needing to buy two.

Lin also highlights that smaller salad kits can be found for less at Kroger, Publix, Sprouts, and Lidl. These are priced between $2.75 to $3.50, compared to Costco's $7 to $9 kits.

Raw chicken is cheaper at other supermarkets, with Lin finding it as low as $1.79 a pound. Costco sells it for $3 a pound.

For herbs and spices, smaller quantities might be a better choice. The Eating Well Test Kitchen recommends using ground spices within a year for the best quality.

Canned soup is more wallet-friendly at local supermarkets, with sales allowing for a mix of flavors. Lin notes these can go for three for $5, sometimes even less.

Cereal is another item where savings can be found at supermarkets through sales and coupons. Lin shares how she's gotten name-brand cereals for $1.50 a box by buying six.

Lin advises not to worry too much about planning shopping trips. If you're at Costco and need something, it's okay to buy it there instead of making an extra trip.

In summary, while Costco offers great deals, some groceries might be cheaper at local supermarkets. Lin's insights help shoppers make informed decisions.

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