I have a package of Trader Joe's Gluten-Free Brownie Mix that calls for 1 egg and 1/2 cup oil - can I use both chia seeds and applesauce? I was going to use the chia seed gel as an egg substitute (which I've done before), but now I've read that applesauce is also an egg substitute. I thought it was an oil substitute? Do I use one or both and how much? I don't want to overdo it and have soggy brownies.