Separate the egg yolks from the egg whites and beat the egg whites until stiff. Whisk egg yolks and sugar together until foamy.
Prepare the mocha coffee and mix with the milk.
Add oil, coffee and vanilla to the egg yolks. Then add the flour, baking powder and salt and whisk everything together.
Incorporate the egg whites from the bottom up, being careful not to break up the mixture.
Fill the cupcake pan and sprinkle with chocolate drops. Bake at 180°C for about 15-17 minutes.