Seeds of one vanilla bean (or 1 teaspoon pure vanilla extract)
For the frosting
1/2cupunsalted butter, softened
3 1/2cupspowdered sugar
1/3cupmilk
1teaspoonvanilla paste or extract
1/2teaspoonorange zest
orange sprinkles (optional)
Instructions
Preheat the oven to 350°F. Prepare a 9×13 pan with parchment paper and spray with baking spray.
In the bowl of a stand mixer using the paddle attachment, cream together butter, salt, sugar, orange zest and vanilla beans. Add egg yolks and mix well. Add flour and mix until a dough forms.
Press the dough evenly into the bottom of the prepared pan.
Bake for 12 to 14 minutes or until firm. Remove and let cool completely on a wire rack.
Meanwhile, combine all of the frosting ingredients in the bowl of a standing mixer and whip until fluffy.
Spread the frosting over the cooled cookie base and immediately sprinkle with sprinkles.
Chill in the freezer for at least 30 minutes before slicing into bars and serving.