Step 1

Preheat oven to 350F degrees.

Step 2

Grease an 8-inch round pan with nonstick spray.

Step 3

In a bowl, whisk together the cake mix, club soda and vanilla until well blended.

Step 4

Scrape batter into the prepared baking pan.

Step 5

Place in the center of the oven and bake until a thin knife inserted into the center comes out clean, about 25 to 35 minutes.

Step 6

Remove from the oven and place on a wire rack to cool.

Step 7

When cool, remove from the pan and spread with a very thin coating of your favorite frosting.