Swap Options: Can’t find cake flour? You can make your own by removing two tablespoons per cup of all-purpose flour and replacing it with two tablespoons of cornstarch. Preheat the oven to 325 F ...
Full instructions are below, but here's a brief recap before you get started: Make the Cake: Combine oatmeal, baking soda, and water; let stand 20 minutes. Cream butter and sugars in another bowl.