To heat up a precooked ham without drying it out, allow the ham to reach room temperature, heat it in the oven at a low temperature, covered with foil and a bit of liquid, and cook until it reaches 140°F.
To heat up a precooked ham without drying it out, it's important to keep the moisture in and heat the ham gently to avoid overcooking. Before reheating, let the ham come to room temperature, which promotes even heating and helps to prevent drying out. Preheat your oven to a low temperature, typically around 275°F to 325°F (135°C to 162°C), and place the ham in a baking dish or roasting pan.
Then, add a bit of liquid like water, broth, or wine to the dish, and cover the ham tightly with aluminum foil. This method will trap the moisture, creating a steamy environment that heats the ham without drying it. For extra flavor and moisture, you can also glaze the ham toward the end of cooking. Usually, you should heat the ham to an internal temperature of 140°F (60°C) as this is the temperature recommended for reheating fully cooked foods like ham.