Preheat the oven to 350°F (175°C).

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

In another bowl, cream the softened butter and sugar until light and fluffy.

Add the egg, vanilla extract, and green food coloring to the butter mixture and mix until well combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Drop tablespoon-sized balls of dough onto a baking sheet lined with parchment paper.

Flatten each ball slightly and sprinkle with decorative sprinkles.

Bake in the preheated oven for 8-10 minutes or until the edges are lightly golden.

Let the cookies cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.