Step 1

Preheat oven to 210°C / 410°F (190°C fan). Place shelf in the top 1/3 of the oven. Line a 12-hole standard muffin tin with paper cases.

Step 2

Sift Dry ingredients: Sift flour, baking soda and salt into a large bowl.

Step 3

Bloom cocoa: In a separate bowl, sift the cocoa then add coffee and HOT milk. Whisk until lump-free.

Step 4

Add remaining Wet ingredients: To the cocoa mixture, add sugar, oil, egg, sour cream and vanilla. Whisk until smooth.

Step 5

Mix flour in: Pour Wet mix into the bowl holding the flour. Whisk until smooth and glossy. Stop once it's smooth, don't mix excessively. (Note 7)

Step 6

Add chocolate chips: Stir in most of the chocolate chips - reserve approx 1/4 cup for topping.

Step 7

Fill muffin tin: Divide the batter between the 12 holes, up to 0.5cm / 0.2" from rim of paper liner. (Note 8)

Step 8

Top with chocolate chips: Top muffins with reserved chocolate chips (just pile in middle, they spread when baked).

Step 9

Bake at high temp, 5 minutes: Bake for 5 minutes in preheated oven. The higher temp kick will start the rise.

Step 10

Lower oven, 20 minutes: Turn oven DOWN to 190°C / 375°F (170°C fan). Bake a further 20 minutes, checking at 15 minutes. When toothpick comes out clean they're ready. Don't confuse melted chocolate with raw batter!

Step 11

EAT! Rest in muffin tin for a few minutes, then transfer to cooling rack. Allow to cool for 15 minutes before devouring!