Use **2 pounds, so about 50 minutes**, assuming you’re roasting both pieces side by side in a preheated oven at the recipe’s temperature. Each piece cooks separately; their weights don’t add together for timing.

Leave space between them for heat to circulate. They may take slightly longer together, so treat 50 minutes as an estimate and check each piece with a meat thermometer.

For beef roasts, the USDA recommends **145°F (63°C) in the thickest part, followed by at least a 3-minute rest**. [USDA temperature guidance](https://www.fsis.usda.gov/food-safety/safe-food-handling-and-preparation/food-safety-basics/safe-temperature-chart)