- 1 box white cake mix
- 1 cup Grape Crush soda (or any grape-flavored soda)
- ½ cup vegetable oil
- 3 eggs
- 1 teaspoon vanilla extract
- A few drops purple food coloring (optional, for a bolder color)
For the Grape Buttercream Frosting:
- 1 cup unsalted butter, softened
- 3 cups powdered sugar
- 3 tablespoons Grape Crush soda
- 1 teaspoon vanilla extract
- A few drops purple food coloring (optional)