1 box (15 ounces) spice cake mix
1 1/4 cups apple cider
1/3 cup vegetable oil
1/2 cup walnuts (optional)
1/2 cup ( 1 stick ) softened butter
1/4 cup apple cider
3 1/2 to 4 cups powdered sugar
Preheat oven to 350 degrees. Line 24 muffin cups with paper baking cups.
Beat cake mix, apple cider, oil and eggs in a bowl with electric mixer for about 2 minutes or until blended. Scoop batter into prepared muffin cups.
Bake 18 to 20 minutes or until toothpick inserted into centers comes out clean. Cool completely.
To prepare frosting, beat butter and apple cider with electric mixer at low speed until well blended. Gradually beat in 3 1/2 to 4 cups powdered sugar until smooth and desired consistency.
Frost cupcakes and garnish each cupcake with a few walnuts if you like.