Preheat your oven to 375 degrees Fahrenheit (190 degrees Celsius) and prepare a 12-cup muffin tin with paper liners.
Add the flour, sugar, salt and baking powder to a bowl and whisk together to combine.
Add the chocolate chips to the flour mixture and stir to combine.
Measure the milk into a 2-cup size liquid measuring cup.
Add the egg, vanilla and vegetable oil and whisk them together with a fork.
Pour the wet ingredients into the dry ingredients and stir everything together gently just until combined with a wooden spoon or a silicone spatula - just until no streaks of flour remain.
Portion the batter into the 12 muffin cups, filling them about 2/3 to 3/4 full. This recipe makes between 12 and 16 muffins, depending on the size of your pan.
Top each muffin with a couple extra chocolate chips, if desired (this step is optional, but it makes for a beautiful presentation).
Bake the muffins at 375 degrees Fahrenheit (190 degrees Celsius) for about 20 minutes or until the tops of the muffins are a light golden brown and a toothpick inserted into one of the muffins comes out clean.