Step 1

Split the oil between two mugs and use your fingers to spread the oil evenly along the bottom and sides of the inside of the mug.

Step 2

Add the sugar to a bowl and sift in the cocoa powder.

Step 3

Add the egg, heavy cream and vanilla extract, and whisk the mixture until smooth.

Step 4

Add the baking powder and whisk it in until there are no lumps, but be careful not to over mix it.

Step 5

Split the batter between the two oiled mugs.

Step 6

Microwave the mugs one at a time until the batter rises halfway up the sides of the mug. In a 1000 watt microwave, this takes about 20 seconds.

Step 7

Flip the cake out onto a plate and eat it while it is still warm.