For the Dough: Cream the shortening with the sugar until light and fluffy, about 3- 5 minutes.
Add the lemon zest, the aquafaba & the extracts to the creaming butter/sugar mixture then stop the mixer to scrape the sides of the bowl
Next sift together the flour baking powder & salt then add it all at once to the creamed mixture. Mix just until it is all combined.
Wrap this dough disc in plastic wrap & 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
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 & cut shapes as desired
Bake on a parchment lined sheet pan in a preheated 350°F oven for approximately 20 minutes or until golden browned & baked through *it's difficult to say exactly since all shapes and sizes of cookie bake differently For the Royal Icing Add the aquafaba & vanilla extract to the sifted confectioners sugar & mix well, adjust the consistency with more aquafaba for a runnier icing or more confectioners sugar for a stiffer icing. Add color as desired
Prepare the Buttercream recipe as per the instructions on the recipe you choose then assemble the cake as shown in the video