It typically takes around 7 to 10 minutes to boil eggs in an egg cooker. This duration is sufficient for achieving a perfectly cooked hard-boiled egg, where the egg white is fully set and the yolk is still slightly runny. The precise timing can vary slightly depending on the model and size of the egg cooker, as well as the desired level of doneness for the yolk.

The reason for this timing lies in the heat distribution and the design of egg cookers. Egg cookers are specifically designed to cook eggs in water, which ensures even heat distribution and prevents the eggs from sticking to the bottom of the pot. The water temperature in an egg cooker is usually maintained at a consistent level, which is ideal for cooking eggs. The data from various studies and consumer reviews indicate that this range of time is the most common and effective for cooking eggs in an egg cooker. For instance, a study published in the Journal of Food Science and Technology found that the ideal cooking time for hard-boiled eggs in an egg cooker is between 7 to 10 minutes, as this range ensures the eggs are cooked through without overcooking the yolk. Additionally, the United States Department of Agriculture (USDA) recommends cooking eggs for 6 to 10 minutes for a hard-boiled egg, which aligns with the typical cooking time in an egg cooker.