For an extra layer of flavor, try adding a tablespoon of instant espresso powder to the cupcake batter. Be sure to use room temperature ingredients for the frosting to ensure a smooth and creamy texture. If you don't have sour cream, you can substitute plain yogurt. The cupcakes can be stored in an airtight container at room temperature for up to 3 days.
Meredith Johnson
Jun 29, 2025The frosting is amazing! It's not too sweet and has a wonderful stout flavor.
Chris Simonis
Jun 24, 2025These cupcakes were a hit at my St. Patrick's Day party! Everyone loved the subtle Guinness flavor.
Opal Dibbert
Jun 20, 2025I found the cupcakes a little dry, so I added an extra tablespoon of oil to the batter. They turned out perfectly!
Jolie Gibson
Jun 10, 2025This recipe is so easy to follow. I'm not a baker, and I was able to make these without any problems.