Beat shortening, sugar, flax egg, milk, BP, salt to combine
Beat in flour
Beat in additional of 1 tsp vanilla essence, 1 tbsp aquafaba and 1 tbsp milk
Shape by a tbsp and press each with the bottom of a glass (or press with fork)
Microwave for 1 1/2 mins to 2 mins on 50 % power. Cool on rack.