Preheat the oven to 350 degrees. Spray or line a standard muffin tin.
Using a hand or stand mixer, add in your oil, eggs, and soda, and mix on medium until well incorporated.
Add batter into the muffin tin until each is about 2/3 full. Bake for 18-20 minutes, or until a toothpick comes out clean. Allow to cool completely before frosting.
Frosting
In a large mixing bowl, using an electric hand or stand mixer, cream the butter, and beat until light and fluffy (about 2 minutes).
Slowly mix in the powdered sugar, 1 cup at a time, while adding a bit of the liquid mixture in between each cup. Continue to mix for 1 minute or until creamy.
Prepare a piping bag and fill the bag with frosting and frost your cupcakes. Add your maraschino cherry and straw if desired. Enjoy! Makes 24 cupcakes.
Notes
Room Temperature Soda: Let the root beer sit for a few minutes so it is not overly fizzy when mixing.
Do Not Overmix: Mix just until the batter is combined to keep cupcakes light and fluffy.
Fill Liners Evenly: Fill cupcake liners about two-thirds full for the best shape.
Cool Completely: Frost only after cupcakes have cooled fully.