Preheat your oven to 375°F (190°C) and grease a 12x17 inch cookie sheet.

Cream together softened butter and sugar until light and fluffy.

Incorporate eggs one at a time, then add vanilla extract.

In a separate bowl, whisk together flour, baking soda, and salt.

Gradually mix dry ingredients into the wet mixture until just combined.

Press the dough evenly onto the greased cookie sheet.

Bake for approximately 15 minutes until lightly golden.

Allow the bars to cool completely before frosting.

For the frosting, beat together butter and powdered sugar, adding milk, almond extract, and green food coloring if desired.

Spread frosting over the cooled bars and add sprinkles before serving.