Preheat oven to 325°F (163°C). Line a baking sheet with parchment paper and set aside.
In a stand mixer, combine all cookie ingredients and mix slowly until a crumbly dough forms. The dough should hold together when squeezed.
½ cup softened butter, ⅓ cup powdered sugar, ¼ tsp vanilla extract, 1 cup all-purpose flour, ½ sachet Simply Desserts Pistachio Pudding
Roll out the dough on a floured surface into a long rectangle and square the edges. Score, then cut into ½-inch-wide sticks.
Place the sticks evenly on the prepared baking sheet and bake for 12-15 minutes, or until the cookies are barely golden brown. Remove from the oven and let cool completely.
Prepare the Simply Desserts Vanilla Frosting by mixing it with ½ cup of milk. Add a few drops of green food coloring if desired. Dip or drizzle the cookie sticks with frosting and sprinkle with St. Patrick’s Day sprinkles.
1 sachet Simply Desserts Vanilla Frosting, ½ cup milk of choice, St. Patrick's Day sprinkles, Green food coloring