Step 1

Preheat oven to 375°F. Grease a half sheet pan (13x18 inches). Set aside.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment, cream the butter and sugar until fluffy. Add eggs, one at a time, mixing after each egg. Add vanilla & mix well.

Step 3

In a separate bowl, combine flour, salt & soda & stir with a whisk to combine. Add to the wet mixture and mix just until combined. Spread on the prepared baking sheet.

Step 4

Bake for 12-17 min, until light golden brown or until a toothpick comes out clean. Cool completely and frost.

Step 5

Make the frosting:

Step 6

In the bowl of a stand mixer fitted with the paddle attachment or in a large bowl with an electric hand mixer, beat the butter until smooth. Add vanilla and salt.

Step 7

Add powdered sugar in 1-2 cup increments until combined, then add milk & mix until smooth and spreading consistency. If desired, add food coloring.

Step 8

Spread over cooled cookie. Top with sprinkles. Cut into bars or triangles and serve.