Ingredients:
- Three 11.2-ounce bottles stout beer, such as Guinness
- Nonstick cooking spray, for spraying the cupcake liners
- 1 1/4 cups granulated sugar
- 1 1/4 cups all-purpose flour
- 1/2 teaspoon baking soda
- 1/4 teaspoon cinnamon
- 1/4 teaspoon kosher salt
- 4 tablespoons (1/2 stick) unsalted butter, melted
- 2 large eggs
- 1/2 cup heavy cream
- 4 ounces cream cheese
- 4 tablespoons (1/2 stick) unsalted butter, at room temperature
- 1/4 cup whiskey
- 2 cups confectioners’ sugar (about 8 ounces)