Mix flour, baking powder and salt together in a bowl, set aside.
Mix milk and calamansi together in another bowl, set aside.
Cream butter and sugar for 2-3 minutes.
Add eggs one at a time and mix well.
Add in milk mixture and flour mixture.
Mix until well blended, don’t over mix.
Scoop in non stick muffin pans.
Bake in preheated 350 degrees Fahrenheit oven for 18-23 minutes.