1Preheat your oven to 350°F (175°C) and line a muffin tin with paper liners or grease with non-stick spray.
In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, and salt.
In another bowl, beat the milk, vegetable oil, and egg until well combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Be careful not to overmix.
Fill each muffin cup about 2/3 full with the batter.
Bake for 20-25 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Allow the muffins to cool for a few minutes in the pan, then transfer them to a wire rack to cool completely.
Drizzle Hershey's chocolate syrup over the top of each muffin before serving.