Step 1

Start by pre-heating your oven to 180c/350f. Also grease and line an 8 inch square cake tin.

Step 2

Mix together your melted butter and cocoa powder, leave this aside.

Step 3

In a large bowl, add both sugars, the eggs and vanilla. Whip this until the mixture almost doubles in size and lightens in colour, you should only need to whip it for about a minute or two.

Step 4

Pour the melted butter/cocoa powder mixture into this, whisk this in.

Step 5

In a separate bowl, mix together the glutinous rice flour, baking powder and salt. Also mix together the milk and the coffee. If your coffee doesn't fully dissolve in the milk, heat this mixture in your microwave until all the coffee has dissolved.

Step 6

Add the flour mix into your whipped egg mixture, along with 1/3 of the milk. Whisk this in until the flour is no longer visible, then add another 1/3 of the milk. Whisk this in, then add the remaining milk and whisk until you get a smooth batter.

Step 7

Pour this into your prepared tin and bake at 180c/350f for around 1 hour 20 minutes - 1 hour 30 minutes, OR until a toothpick inserted into the centre comes out mostly clean, it's ok if there are a few moist crumbs on it.

Step 8

Once baked, sprinkle some flaky salt on top then leave this to cool at room temperature for about 20 minutes, then place this into your fridge and leave it in there for 1 hour.

Step 9

Now take it out of the tin, cut it into slices and enjoy!