Preheat oven to 180°C/350°F and line 2 cupcake pans with 14 papers
Sift flour, cocoa, baking soda, baking powder and salt and set aside
In the bowl of a stand mixer, beat the eggs, sugar and vanilla on medium-high speed for 10 minutes, stopping and scraping the bowl as needed.
Now add the sour cream and mix on low until combined
Stop the mixer and add half of the flour mixture, mixing on low until just combined.
With the mixer on low, slowly add half of the coffee
Repeat the flour and coffee additions, then mix until just combined
Use an ice cream scoop to scoop the mixture into the cupcake papers
Bake 1 tray at a time for 20 minutes
Remove from oven and cool the cupcakes on a cooling rack. Decorate once cooled.