Preheat the oven

• Preheat the oven to 180 °C.

Mix the wet ingredients

• Whisk the buttermilk, neutral oil, egg and vanilla together in a bowl.

Combine the dry ingredients

• In another bowl, stir together the flour, sugar, cocoa powder, baking soda, instant coffee and salt.

Make the batter

• Pour the wet ingredients into the dry ingredients and mix until just combined.
• Fold in the chopped chocolate.

Fill the muffin pan

• Divide the batter between the muffin cups.

Bake the muffins

• Bake at 180 °C for 20 minutes, until a skewer comes out clean.

Cool and serve

• Let the muffins cool slightly in the pan, then serve with a cold glass of milk.