From the Lehigh Valley Live website, May 2011. One of my coworkers brought these in and I had to have the recipe! It uses an injector for the apple butter filling so I have to figure out how to do that (or go buy one!).
Preheat oven to 350. Grease or line 12 cupcake wells.
In large bowl, cream together butter and sugar. Add eggs, one at a time, beating well after each addition.
Sift together flour, baking powder, cinnamon and salt. Add 1/3 of the flour mixture to the butter/sugar mixture, then 1/2 of the cider, and repeat, ending with the last of the flour and mixing only until incorporated.
Pour into prepared cupcake pan, filling each cup 3/4 way full. Bake 20 minutes or until a toothpick inserted in the center of the cupcake comes out clean. Cool thoroughly, inject with apple butter in the center of the cupcake, then frost.
Melt brown sugar and 4 tablespoons butter in a saucepan over medium heat. Stir until sugar dissolves. Bring to a boil over medium heat; remove from heat. Whisk in cream; blend well. Transfer to a heat-resistant bowl. Cool at room temperature, stirring occasionally.
Place remaining 6 tablespoons butter and cream cheese in a large bowl; beat with a mixer on medium-high speed until smooth. Beat in vanilla and salt. With mixer running, slowly pour in cooled brown sugar mixture; beat until smooth. Add powdered sugar gradually, beating well after each addition until completely smooth. Chill slightly for a firmer texture, stirring occasionally.