How do you cook Costco broccoli stuffed chicken?Preheat the oven to 350°F. Remove the Costco Broccoli & Cheese Stuffed Chicken Breast from the box and set the breasts in a shallow baking dish in the oven. Bake your Costco Stuffed Chicken Broccoli for 30 minutes on all sides, rotating every 10 minutes to brown both sides.
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