Turns out, duck eggs are pretty similar to chicken eggs. Of course the duck eggs are larger - about 30% larger to be precise. Our duck eggs usually weigh in right around 3 ounces, which is considerably heavier than even jumbo chicken eggs.
We have Pekins, Saxonies, Magpies, Anconas and a Silver Appleyard and love them all. Our ducks outlay our chickens year after year, laying right through the winter with no added coop light.
Purportedly duck eggs are an alkaline-producing food, one of the few foods that leave your body more alkaline. This is of great benefit to cancer patients as cancer cells do not thrive in an alkaline environment. Chicken eggs are an acidic food leaving your body more acid.
Duck eggs contain slightly less water and more fat which makes them superior for baking. They make cakes and breads rise better. On the flip side, overcooking them makes them rubbery, so they aren't best used for frying or scrambling, although we do eat them both ways with care taken not to overcook them. I find the eggs do have a bit stronger 'egg' taste than chicken eggs which makes them stand up better to strong cheese such as Swiss or sharp cheddar, say in an omelet.
I always use our duck eggs in a one-to-one ratio in recipes that call for chicken eggs (I try and use the smallest for baking), but since a large chicken egg contains roughly 3 Tablespoons, you can also lightly whisk the duck eggs and then measure out 3 Tablespoon amounts to equal the number of eggs the recipe calls for.
Duck eggs stay fresher longer than chicken eggs due to having thicker shells. Their whites are firmer, and ounce for ounce they contain more calcium, Vitamin B-12, Vitamin A, and Vitamin D than chicken eggs. They contain less Vitamin E and about the same amount of protein as a chicken egg, and one duck egg delivers almost a full day's serving of cholesterol. Neither duck or chicken eggs contain any Vitamin C. One duck egg contains about 130 calories, half of which are fat calories.
Overall, the large, rich duck eggs make a nice contrast in color, size, taste and composition to our chicken eggs and I feel blessed to have both provided by our backyard flock.