Preheat your oven to 350°F (175°C) and line two baking sheets with parchment paper.

In a bowl, whisk together flour, baking powder, and salt; set aside.

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

Add eggs one at a time, mixing well after each addition, then stir in vanilla extract.

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

Divide dough into three bowls, adding different food coloring gels to each; swirl colors gently without blending completely.

Spoon dollops of colored dough onto the prepared baking sheets.

Bake for 10-12 minutes or until golden brown on the edges; cool on wire racks before serving.