Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

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

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

Add eggs one at a time followed by vanilla extract; mix until well combined.

Gradually incorporate dry ingredients into the wet mixture until just blended.

Divide the dough into bowls; add food coloring to each and mix gently for swirls.

Scoop spoonfuls of colored dough onto the prepared baking sheet; swirl them with a toothpick.

Bake for 10-12 minutes or until edges are golden but centers remain soft. Cool on wire racks before serving.