More Failed Eggless Choux

Choux pastry (the kind used in eclairs and creampuffs) is very picky, and depends heavily on the chemical properties of eggs. Five years ago I played around with trying to make it eggless with aquafaba and xanthan gum. It didn't work, but now that we have vegan egg white protein, can we do this for real? Nope. I gave it several tries over vacation, and wasn't able to get it to puff properly. Here's the closest I got: Panade 1/2 C water 1/4 C milk 5T butter 1t sugar 14T flour Egg replacement 9T water 1/2t powdered lecithin 3T plus 1t egg white powder 2T butter, melted but cool As with standard choux I heated the water, milk, butter, and sugar to a boil, then added the flour. I mixed it well, let it cool a little, and then gradually added the egg (replacement) while beating will in between additions. The batter looked just right: But when I baked it, it didn't inflate. I tried again, and this time took advantage of the AirBnB's nice oven to observe that there were little bubbles on the…