Once you've poached a million eggs, you can tell their level of doneness by just looking at them. But for the rest of the world, it works like this: Runny eggs take 2 minutes, medium take 3 minutes, and firm take 4 minutes. Mistake #8: You're Serving Soggy Eggs.Your eggs are now ready to eat, with one exception.nce you've poached a million eggs, you can tell their level of doneness by just looking at them. But for the rest of the world, it works like this: Runny eggs take 2 minutes, medium take 3 minutes, and firm take 4 minutes. Mistake #8: You're Serving Soggy Eggs.