01 - Preheat the oven to 375°F (190°C). Line a 12-cup muffin tin with paper liners or grease thoroughly.
02 - In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until evenly mixed.
03 - In a separate bowl, whisk together the milk, vegetable oil (or melted butter), eggs, and vanilla extract until fully blended.
04 - Pour the wet ingredients into the dry ingredients and stir gently just until combined, avoiding overmixing.
05 - Fold in the chocolate chips, reserving a few to sprinkle on top before baking.
06 - Divide the batter evenly among the muffin cups, filling each approximately three-quarters full. Sprinkle reserved chips on top.
07 - Bake for 18 to 20 minutes, or until a toothpick inserted into the center comes out clean, allowing for a few melted chocolate streaks.
08 - Let muffins cool in the pan for 5 minutes before transferring to a wire rack to cool completely.