Sift together flour, salt & pumpkin spice.
Using an electric mixer beat the butter and sugar together until light and fluffy—5 minutes.
Add vanilla bean, mix well then add eggs. Beat to combine.
Slowly add the flour mix until the dough is smooth.
Separate the dough and wrap it in 3 separate pieces. Place in the fridge and chill for at least 30 minutes.
When ready to bake, preheat the oven to 350 degrees. Line several cookie sheets with parchment paper.
Flour a work surface and roll the disk out to ¼ inch thick.
Cut out Shamrock cookie shapes for brush embroidery technique.
For Stained glass look - cut dough with large circle cookie cutter (make sure Shamrock cookie cutter fits into circle). Then cut shamrock inside circle. Fill each Shamrock shape with crushed green lifesavers. Cookie sheet MUST be lined with parchment paper or cookies will stick to cookie sheet.
Bake for 8-10 minutes. (edges just starting to brown)
Cool completely on the cookie sheets before moving.
Decorate with Royal Icing.