Instructions: Set the oven temperature to 175C 350F. Mix the flour, sugar, baking soda, cocoa powder, baking powder, and salt in a mixing bowl. Beat the egg, vegetable oil, buttermilk, and vanilla extract in a different bowl. After adding the wet ingredients to the dry ingredients, thoroughly mix them together. Add the chocolate chips and stir. After greasing a donut pan, pour the batter into each mold. When a toothpick is inserted into a donut, it should come out clean after baking for 10 to 12 minutes. After a few minutes, let the donuts cool in the pan before moving them to a wire rack to finish cooling. After the donuts cool, you can choose to either dust them with powdered sugar or glaze them with melted chocolate. Savor your mouthwatering baked chocolate doughnuts!