Start by preheating your oven to 400 degrees Fahrenheit. This is crucial for ensuring that your muffins bake evenly and rise perfectly.
Next, prepare your muffin pan. You can line each cup with cupcake liners or generously grease them with butter or cooking spray. This will help your muffins release easily after baking.
In a large mixing bowl, whisk together 1 ¾ cups of flour, ¾ cup of sugar, 2 teaspoons of baking powder, and ½ teaspoon of baking soda. Make sure there are no lumps for a smooth batter.
In a separate medium bowl, whisk the egg until smooth. Then add 1 cup of milk, ⅓ cup of vegetable oil, and 1 teaspoon of vanilla extract. Mix everything together until well combined.
Gently pour the wet ingredients into the dry ingredients and stir until just combined. It's okay if the batter is a little lumpy; overmixing can lead to dense muffins.
Now it’s time to fold in 1 cup of chocolate chips. This is where the magic happens! The chocolate chips will melt slightly during baking, creating gooey pockets of chocolate.
Fill each muffin cup with batter, about two-thirds full. This will allow the muffins to rise without overflowing.
Place the muffin pan in the preheated oven and bake for about 18 to 22 minutes. The muffins are done when they spring back lightly when pressed in the center.
Once baked, remove the muffins from the oven and let them cool in the pan for several minutes. Then transfer them to a wire rack to cool completely.
Finally, store your muffins in an airtight container at room temperature for up to 4 days. Enjoy!