Preheat oven to 325 degrees F. Beat butter at medium speed with an electric mixer until creamy. Gradually add sugar, beating until light and fluffy. Add eggs, 1 at a time, beating just until blended after each addition.
Stir together flour and next 4 ingredients. Gradually add flour mixture to butter mixture alternately with apple cider, beginning and ending with flour mixture. Beat a low speed just until blended after each addition. Stir in vanilla.
Lightly grease disposable loaf pans with cooking spray. Pour batter into prepared pans, and place on a baking sheet.
Bake for 40 to 45 minutes or until a toothpick inserted in center comes out clean. Cool in pans on wire racks 10 minutes. Remove from pans to wire racks, and cool completely (about 1 hour). For glaze-topped cakes, spoon glaze over cooled cakes.
Bourbon Glaze: In a medium bowl, stir the confectioners' sugar and bourbon until combined. Add more vanilla if glaze is too thick.