01 -
Preheat oven to 350°F and line a baking sheet with parchment paper.
02 -
Whisk together all-purpose flour, baking soda, and salt in a medium bowl until well mixed.
03 -
In a large bowl, beat softened unsalted butter, granulated sugar, and brown sugar until the mixture becomes light and fluffy.
04 -
Incorporate eggs one at a time into the creamed mixture, blending thoroughly after each addition. Mix in vanilla extract.
05 -
Gradually add dry ingredients to the wet mixture, stirring until just combined. Avoid overmixing.
06 -
Fold chocolate chips evenly into the dough.
07 -
Portion the cookie dough equally into four bowls, adding a different gel food coloring to each portion, then mix until color is uniform.
08 -
Pinch small pieces from each colored dough and gently roll together to form a marbled dough ball.
09 -
Arrange dough balls on prepared baking sheet and flatten slightly. Bake for 9 to 11 minutes, until edges are lightly golden.
10 -
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.