It definitely took way more than 90 seconds to make this. I actually got this recipe from here which linked to here, who got the recipe from here (... thank goodness for rebloggers I guess?). It looked simple enough so I had a go.
I didn't have any cocoa powder at home, so I used the next best thing - Milo Fuze 3-in-1. This also eliminated the need to add any sugar, the instant pack milo is sweet enough.
1) 1 tablespoon (and a bit more) of Nutella
2) 1 heaping tablespoon of flour
3) half teaspoon baking powder
4) 1 packet Milo Fuze 3-in-1
5) 1egg (beaten)
Mix everything together and put the mixture into a microwaveable bowl or container. Set the microwave to 70% and set the timer for 40-60 seconds. I initially set 30 seconds but nothing happened. So I set another 20 seconds and saw the thing 'rise'. It's mostly trial and error, watch it closely to see it still retains that moistness.
Ta-da! Yes, it's as delicious as it looks. Seriously! Will add a scoop of ice cream next time I make this.