Preheat oven to 300 F. Generously oil two 9 inch pie pans and line with parchment paper. In a large bowl, add powdered sugar, softened butter, and mix until light and fluffy. Then add vanilla extract and continue mixing until well combined.

Next add all-purpose flour, salt, and mix until well incorporated. Divide cookie dough in half, place into the pie pans and spread the cookie dough out evenly. Poke the cookie dough with a fork.

Bake for 30 minutes, then remove from oven and place onto cookie board and using a sharp knife, immediately cut each shortbread round into 8 wedges. Transfer onto cookie rack and cool completely.

Melt the candy melts in a plastic baggie or a piping bag. Drizzle over cookies and immediately garnish with sprinkles.