Why 325°F? It’s the Goldilocks temperature for big birds. Too high, and the outside gets crispy while the inside (and the stuffing) stays raw. Too low, and you’ll be carving at midnight.
Think of it like a slow dance: you want the heat to gently travel into that dense, 18-pound center. The stuffing acts like a heat sponge, soaking up energy and slowing everything down by about 30 to 45 minutes compared to an unstuffed bird.
The Real Clock: Minutes Per Pound
Here’s a fun little formula: 15 minutes per pound for a stuffed turkey. So 18 pounds times 15 minutes equals 270 minutes. That’s 4 hours and 30 minutes. Simple math, right? But don’t set your timer and walk away.
Why not? Because thermometers don't lie, but clocks do (metaphorically). The USDA says the stuffing must hit a safe 165°F, and the breast meat should reach 165°F too. The thigh? That can climb to 175°F without turning into leather.