Prep Flour: Add flour, salt, and baking soda to a medium sized bowl. Mix and set aside.
Cream Butter and Sugar: Add softened butter to a large bowl and add sugar. With a hand mixer or a stand mixer, cream butter and sugar - approximately 3 minutes.
Create Dough: Add egg whites, sour cream, and vanilla extract, and mix well. Slowly add flour and continue to mix until a sticky dough forms. Once all of the flour is incorporated, add the food coloring and mix well until it is all incorporated and pink. Add more if you'd like it a darker shade of pink. Fold in white chocolate chips.
Chill Dough: Once the dough is mixed, cover the bowl with plastic wrap and chill the dough in the fridge for at least 1 hour and up to 24.
Preheat Oven: Preheat the oven to 350℉ and line baking trays with parchment paper.
Shape Dough: Once the dough has chilled, take about 2 tablespoons of dough and shape it into a circle or a heart and place them on parchment paper 1-2 inches apart. Repeat for all dough.
Bake: Bake in the oven for 10-12 minutes until the bottoms are slightly browned and a cake tester pulls clean.
Serve and Enjoy!