Step 1

Preheat the oven to 375°F. Line a 12-cup muffin pan with cupcake liners or spray with non-stick cooking spray.

Step 2

Sift together the flour, cocoa powder, salt, baking powder, baking soda, and sugar in a small bowl and set aside.

Step 3

In a large mixing bowl, beat or whisk together eggs, melted butter, vanilla extract, buttermilk, and sour cream.

Step 4

Dump the dry ingredients into the butter/eggs/sour cream mixture and stir gently, just until combined. Do not overmix.

Step 5

Add the chocolate chips and stir just until they are distributed throughout the batter.

Step 6

Divide batter between the 12 muffin cups in the prepared pan, filling each cup about ¾ of the way full.

Step 7

Bake for approximately 20 minutes or until a toothpick inserted in the center of the muffins comes out clean.

Step 8

Cool muffins in pan for 5 minutes. Remove muffins to a cooling rack to finish cooling.