In a bowl cream butter and sugar.
Then add egg, vanilla extract and green food color.
Sieve maida, salt and baking powder.
Add to the wet ingredients and mix nicely.
Now add pistachio Powder. Mix nicely and pour into the piping bag.
Use the plain round nozzle.
Pipe into the baking tray into medium size fingers.
Bake into pre heated oven at 160°C for 20mins.
Cool and enjoy...!!!