Preheat oven to 400 degrees and grease a mini muffin pan.
Combine the flour, sugar, salt, and baking powder in a large bowl.
In a small bowl, combine the oil, egg, vanilla extract, and milk.
Pour the wet mixture into the dry mixture and mix until just combined.
Fold in the chocolate chips.
Spoon batter into muffin tins, filling about 3/4 full.
Place muffin pan into oven and bake for about 9 minutes.
Remove pan from oven and allow to cool slightly before removing from pan and enjoying!