Cream the vegan butter & sugar on high speed until light & fluffy about 3 minutes.
Combine the vanilla extract with the room temperature plant milk then add it to the creaming mixture 1 Tbs at a time, but using only 3 Tbs. The rest goes in last.
Stop and scrape the bottom & sides of the bowl for an even mix.
Add the sifted flour, salt, egg replacer & baking powder by the heaping spoonful in about 4-5 additions while mixing on low speed.
Once the flour is incorporated, add the rest of the plant milk
With your with the #826 tip or with a cookie press pipe the dough onto a parchment lined sheet pan spaced about 1 inch apart.
Bake in a preheated 350°F for about 20-22 minutes or until the cookies are medium browned on the edges I find that the vegan version of spritz cookies take longer to bake for a crispy cookie than non vegan spritz cookies, so be sure to bake them a few minutes longer than lightly golden
Cool completely & decorate with your choice of adornments