Brownie in a mug

I think that you might have heard of this, a brownie in a mug. Yesterday I tried this. The recipe I used is this one, click (dutch). Because it's in Dutch, I'll write the recipe in English here. This is what you'll need. 4 tablespoons of self raising flour, 4.5 tablespoons of sugar, 1 egg, 3.5 tablespoons of Nutella, 3 tablespoons of milk, 3 tablespoons of olive oil, 3 tablespoons of cocoa powder. You don't need to use the exact recipe, you can also add a bit less of something if you want. I used less sugar. Mix it all and put it in a cup. Don't add too much in the cup, because it'll rise when you place it in the microwave. Place the cup in the microwave for like 1minute and 40seconds. It's hot when you take it out, so be careful! Are you gonna try this? If you do, let me know how it went!