Skip: Las Fortunitas tortilla chips
Does the local Costco sell Las Fortunitas chips? You should ignore the ones that are available in a bag as big as a garbage bag. You can buy the bag for less than $6, and this is an awesome deal on its own. The chips taste pretty good as well. However, the reason you should not buy them is that you will not finish the entire thing. We are sure that the 5-pound bag will not be finished even when you throw a party. On top of this, Fooducate has given the chips a rating of B-minus thanks to its hydrogenated oils.
Buy: Kerrygold butter
You will find a number of butter brands at Costco. The organic Kirkland brand is very good. You can also go for Kerrygold if you want high-quality butter. This product is made with the milk of grass-fed cows.