• Preheat your oven to 325°F and and line a cupcake pan with liners.
• Mix together the melted butter, Coca-Cola, cocoa powder, and sugar until smooth and well combined. Add in the eggs until lightly beaten.
• In a separate bowl, whisk together the flour, baking soda, and salt.
• Gradually add the dry mixture to the wet Coca-Cola mixture, mixing until just combined and smooth.
• Divide the batter evenly among the cupcake liners, filling each about 2/3 full.
• Bake for 16–20 minutes, or until a toothpick inserted into the center comes out clean. Remove from the oven and allow the cupcakes to cool completely before frosting.

How to make the fizzy buttercream frosting:

• Add all frosting ingredients (confectioner's sugar, salted butter, heavy cream and vanilla bean paste) in a mixer. Beat on medium-high speed until the icing is light, fluffy, and smooth.

How to decorate the soda cupcakes:

• Pipe the buttercream onto the cooled cupcakes.
• Gently roll or dip the freshly frosted cupcakes into a mix of small and large white sprinkles to create a bubbly, soda-inspired look.