Preheat the oven to 375°F (190°C). Line a muffin tin with paper liners or lightly grease it.
In a large mixing bowl, combine the all-purpose flour and granulated sugar. Stir well to mix evenly.
Add the milk to the dry ingredients and stir gently until just combined. Do not overmix; the batter should be slightly lumpy.
Fold in the semi-sweet chocolate chips evenly throughout the batter.
Divide the batter evenly among the 8 muffin cups, filling each about 3/4 full.
Bake in the preheated oven for 18-20 minutes or until a toothpick inserted into the center of a muffin comes out clean.
Remove the muffins from the oven and allow them to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before serving.