01 -
Flip on your oven to 175°C right away. Pop 10 cupcake liners into your regular tin.
02 -
Toss soft butter, both sugars, into a big bowl or your mixer. Whip until fluffy and pale—takes a minute.
03 -
Crack in the egg and pour in vanilla. Add your salt, baking soda, and cocoa. Stop to scrape the sides for even mixing.
04 -
Stir in sour cream till you can't see any lumps. Pour in milk with coffee syrup next. Go slow with the mixer so you don't make a mess.
05 -
Drop in the flour all at once. Gently mix until the batter looks smooth—don't keep mixing when it comes together.
06 -
Scoop the batter into liners so they're around two-thirds full. Slide into the oven for 18 to 20 minutes at 175°C. They're done when a toothpick poked in the center has just a crumb or two.
07 -
Let them chill in the hot pan for a few minutes. Then move them to a cooling rack. Frost only when they're totally cool.
08 -
Pop cream cheese and butter into a clean bowl or your stand mixer. Beat until the mix looks airy and light. Splash in vanilla and coffee syrup. Scrape down the sides as you go.
09 -
Mix in light brown sugar first. Now add the powdered sugar a cup at a time. Keep going until it's super creamy and firm enough for piping.
10 -
Get the frosting into a piping bag—all set with a big closed star tip or anything else you like. Swirl lots of frosting onto each cupcake. Sprinkle with chocolate bits if you feel fancy.
11 -
You can dig in straight away. Or stash them at room temp or chill in the fridge for a couple days. They get nicer if you let them warm up a bit after being cold.