Step 1: Preheat the oven to 350 F. Grease or line a 12-cup muffin pan.
Step 2: In a large bowl sift together the flour, cocoa, baking powder, baking soda and salt.
Step 3: In a separate bowl whisk together the oil, egg, sugars, buttermilk, butter, maple syrup and vanilla.
Step 4: Add the wet ingredients into the dry ingredients and mix until just combined.
Step 5: Fold in the 3/4 cup of the chocolate chips and 1/2 cup of the pistachios.
Step 6: Divide the batter equally into the muffins tin. Sprinkle the remainder of the chocolate chips and pistachios. Bake for 16-18 minutes, until a toothpick inserted comes out clean. Cool on wire rack before serving.