Line 24 muffin tins with paper liners and set aside.
Take a large size bowl and put cake mix, pumpkin soda, eggs, and water in it and combine them well. Beat on low speed until combined, and then beat at medium speed for 1 minute.
Take the mixture and fill it in the prepared muffin cups.
Bake at 375 degrees F for 20-25 minutes until tops spring back when lightly touched with finger. Let the mixture cool for about 10 minutes and then take it out to wire racks and cool completely.
The next step consists of frosting the cupcakes. Decorate them with candies, frosting, and cookie crumbs.
Use the crumbs to make a 'grave', writing 'RIP' on sandwich cookies with decorator frosting. Make a spider web with black decorator gel frosting and top with candy bugs. Now your easy Halloween cupcakes recepie is ready for serving.