Cream the shortening with the sugar until light and fluffy, about 3- 5 minutes.
Add the lemon zest, the aquafaba and the extracts to the creaming butter/sugar mixture and then stop the mixer and scrape the sides of the bowl
Next sift together the flour baking powder and salt and add it all at once to the creamed mixture. Mix just until it is all combined.
Wrap this dough disc in plastic wrap and chill for at least 2 hours or overnight before using or you can store it for up to 1 week wrapped in plastic wrap in the refrigerator, or in the freezer for 2 months.
You must re work this dough with some additional flour to a pliable consistency after it has been chilled. Do not skip this step.
Knead it with some flour until it is no longer a crumbly mass, but a soft pliable dough
Roll out the dough to ¼" thick and cut shapes as desired
Transfer cookie cutouts to a parchment lined sheet pan and bake in preheated to 350° F oven for approximately 18-22 minutes or until light golden brown.
Cool the cookies while you prepare the vegan royal icing
For the Royal Icing:
Combine the egg replacer with the warm water and whisk smooth
Place the sifted confectioners sugar in a mixing bowl and then add the vanilla extract and the egg replacer mixture.