Let’s get the math out of the way, because your guests don’t care about math, they care about dry breast meat. For a 13-pound stuffed turkey, you need to preheat your oven to 325°F (163°C). The USDA says it’s safe to cook at 325°F or higher, and I trust them more than my Aunt Carol’s "it’s ready when the pop-up thingy pops" advice.
The golden rule? Estimate about 15 minutes per pound for a stuffed bird. Do the quick mental math: 13 x 15 = 195 minutes. That’s 3 hours and 15 minutes, minimum. But don’t set your timer and walk away—ovens lie, and turkeys are passive-aggressive.
Why "Per Pound" Is a Suggestion, Not a Law
Here’s the irony of cooking a stuffed turkey: the stuffing acts like a brick. It’s cold, dense, and it sucks heat away from the bird’s center. So while the breast might hit 165°F in two hours, that stuffing could still be a chilly 140°F, which is a playground for bacteria you don’t want at your dinner table.
This is why your 13-pounder might actually take 4 to 4.5 hours total. I know, I know—you wanted a neat number. But cooking is about physics, not wishes. The real timer is the internal temperature of both the bird and the stuffing. Hit 165°F in the thickest part of the breast and the center of the stuffing, and you’re golden. Period.