Preheat your oven to 350°F (175°C).
Grease and flour a 9x13-inch baking pan.
In a large mixing bowl, cream together the softened butter and sugar until light and fluffy, about 5 minutes.
Add the eggs one at a time, beating well after each addition, followed by the vanilla extract.
In a separate bowl, mix together the flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with the milk, and mix until just combined.
Add a few drops of pink food coloring to the batter until you achieve your desired shade, and mix gently.
Pour the batter into the prepared baking pan and spread it evenly.
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.
Once cooled, slice the cake into squares and serve as desired.
