I used to be someone who'd always grab a chuck roast on sale at Jewel or Mariano's for my Guinness beef stew recipe or a few steaks on sale for a special dinner, and I do believe that the beef Jewel and Mariano's sell is choice grade, but I've had so many experiences in the last year or so with disappointingly flavorless beef that I've become more cynical about supermarket beef and more selective.
I've been googling things like "flavorless beef," and what I've learned so far has changed my beef shopping habits. My ongoing little research project has led me to believe that (a) there's a lot more beef out there these days being sold as choice, including beef from animals---like dairy cows, as opposed to Angus---that weren't bred for their flavor; and (b) a lot of beef that qualifies as choice has nonetheless comes from animals that were fed growth hormones and sped to market too quickly for them to develop flavor.
I wouldn't pass up a chance to buy prime-graded beef from Costco (which, though, if I understand correctly, sells a wider range of "prime" than it used to, and a wider range than specialty butchers and steakhouses sell) or from a specialty butcher (where I live, the closest highly reputable one is Dorfler's in Buffalo Grove), but my schedule these days doesn't often leave time for that, so among the local grocery stores, lately for beef I favor Sunset Foods, which sells the choice-grade "Certified Angus Beef" brand (which, if I remember correctly from my googling, is not merely Angus but at least 51% black Angus). Mariano's appears to sell a choice-grade Angus beef (not necessarily black Angus?) with a different (brand?) name. I have tried without success to find out online if what Mariano's sells is certified black Angus; I'm guessing not, but I'll ask someone next time I'm at Mariano's. Aldi's is a little more slippery than Jewel or Mariano's in that it seems to sell multiple beef products, some of which is labelled Angus and some of which is labelled just USDA choice.
So, in previous years, this is the time of year when I would have bought a prime rib roast at Jewel for $5.99/lb to cook for Christmas, but this year I opted for Sunset's certified black Angus rib roast at $9.99/lb. I'm cautiously optimistic that it will turn out to be a more flavorful choice.
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