The standard time to boil eggs in a steamer is approximately 8 to 10 minutes. This duration ensures that the eggs are fully cooked without overcooking, which can lead to rubbery textures. The cooking time can vary slightly depending on the size of the eggs and the temperature of the water in the steamer. Larger eggs or colder water may require a few extra minutes, while smaller eggs or warmer water may cook more quickly.

The reason for this timing lies in the heat transfer process within the steamer. When eggs are placed in a steamer, they are surrounded by hot, moist air. This heat causes the proteins in the egg whites to coagulate and the yolk to set. The cooking process is slower and more even compared to boiling eggs in water, as the steam gently cooks the eggs from all sides. According to the United States Department of Agriculture (USDA), eggs should be cooked to an internal temperature of 160°F (71°C) to ensure safety and proper doneness. The steaming process typically achieves this temperature within the 8 to 10-minute range.

Research conducted by the USDA indicates that steaming eggs can be a healthier option compared to boiling them in water. Steaming preserves more of the egg's nutrients, such as vitamins and minerals, as it does not require the addition of fats or oils. Additionally, steaming can help retain the natural flavor of the eggs, making them a preferred method for many culinary enthusiasts.

In conclusion, boiling eggs in a steamer takes approximately 8 to 10 minutes, ensuring they are cooked to a safe and desirable level of doneness. The steaming process is not only efficient but also healthier, as it preserves more of the egg's nutritional value.