What are the amount of ingredients 1kg sponge chocolate cake?

For 1kg of sponge chocolate cake, the ingredients are:

- 1/2 cup (or 1 stick) unsalted butter, at room temperature

- 1 cup of sugar

- 3 large eggs

- 1 1/2 teaspoons vanilla extract

- 1 cup all-purpose flour

- 1/4 cup unsweetened cocoa powder

- 1/2 teaspoon baking powder

- 1/4 teaspoon baking soda

- 1/2 teaspoon salt

- 1 cup boiling water

Note: These ingredients will make a slightly larger cake than 1kg, but can be adjusted to the desired size.