If You're Shopping For Prepared Meals At Costco, You Can Safely Skip This One - Tasting Table
Briefly

Costco's stuffed bell peppers with beef and rice were found to be bland and uninspiring by taste testers, falling short of expectations. Despite being a popular item, many found that they do not cook well as per the instructions. Suggestions from online discussions included adding spices, cheese, or marinara sauce to enhance flavor. Taste testers noted that cooking them in an air fryer yielded better results, but not suitable if cooking in bulk. Overall, this dish was viewed as needing significant upgrades to meet taste standards.
Many have found that the peppers don't really soften; they need longer in the oven than suggested, with one Redditor reporting the peppers baked for an hour and a half before they were done.
Despite following the instructions, our taste tester added some hot sauce in an attempt to improve the dish. It didn't do much good, to be fair, and it seems that lots of people have a similar thought when eating these stuffed peppers.
The best tip we've seen so far is pouring marinara sauce over the stuffed peppers to enhance flavor.
Costco's stuffed peppers desperately need an upgrade. They are bland and uninspiring - a very distant cousin to classic stuffed peppers.
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