1. Prepare the Cupcake Batter:

1. Preheat the oven to 350°F (175°C) and line a muffin tin with cupcake liners.
2. In a bowl, whisk together flour, baking powder, baking soda, and salt.
3. In a separate bowl, cream together butter and brown sugar until fluffy.
4. Add eggs, one at a time, beating well after each addition.
5. Mix in vanilla extract, cream soda, and butterscotch syrup.
6. Gradually fold in the dry ingredients until the batter is smooth.
7. Divide batter evenly into 12 cupcake liners.

2. Bake the Cupcakes:

1. Bake for 18-20 minutes or until a toothpick inserted in the center comes out clean.
2. Allow cupcakes to cool completely before frosting.

3. Make the Swirled Frosting:

1. Beat butter until creamy. Gradually add powdered sugar and mix until fluffy.
2. Pour in cream soda and vanilla extract, beating until smooth.
3. Divide frosting into four bowls and tint each with house colors.
4. Transfer colored frostings into separate piping bags.

4. Decorate the Cupcakes:

1. Use a large piping tip to swirl two-tone frosting onto each cupcake.
2. Add edible glitter or house crest toppers for extra magic.