Step 1

Preheat oven to 375F and line a 12-cup muffin tin with muffin tin liners.

Step 2

Whisk together the flour, cocoa powder, baking powder, baking soda, and salt, and set aside.

Step 3

In a separate bowl, whisk together the sugar, eggs, vegetable oil, buttermilk, and vanilla extract.

Step 4

Add the flour mixture to the wet ingredients and mix together well. Then, fold in the chocolate chips.

Step 5

Divide the batter evenly between the 12 muffin tins, and bake for 20 minutes, or until risen and a toothpick inserted into the center of a muffin comes out without wet batter clinging to it.

Step 6

Allow the muffins to cool for a few minutes in the baking pan, then cool completely on a baking rack.