*For a dark black muffin, substitute 1-2 tablespoons of black cocoa powder for unsweetened cocoa powder.
- This recipe provides a very subtle hint of coffee. If you want a stronger coffee flavor, use a double shot espresso. Alternatively, you can add 1-2 tablespoons of instant coffee granules (combine with the milk or hot coffee until dissolved) or espresso powder (mix with the dry ingredients).
- If the espresso liquid measures either less or more than ¼ cup, simply change the amount of milk accordingly. The milk and espresso should be a total of 1 cup.
- For more of a mocha flavor rather than chocolate, reduce the cocoa powder by ¼ cup.
- You can substitute the butter with ½ cup neutral oil such as canola, vegetable, or safflower.