Ingredients
Equipment
Method
- Preheat oven to 425°F (220°C). Line muffin tin with paper liners.
- Whisk together flour, cocoa powder, espresso powder, baking powder, baking soda, and salt.
- Whisk melted butter, oil, and sugars until smooth.
- Add eggs and vanilla. Mix well.
- Stir in milk and sour cream.
- Fold dry ingredients into wet mixture without overmixing.
- Fold in chocolate chips.
- Fill liners nearly full and top with extra chocolate.
- Bake 5 minutes at 425°F, reduce to 350°F and bake 15–18 more minutes.
- Cool slightly before transferring to wire rack.
Notes
Start at high temperature for bakery-style domes. Do not overmix batter.
