This recipe has a bit of a background. My mother used to make a wonderful cake called a Bonnie Butter Cake - the recipe is listed in the old orange Betty Crocker cookbook she gave me when I moved out of the house. However, upon trying to recreate this cake for my husband, I discovered a shocking secret - the recipe she uses for the frosting (arguably the best part of the cake) wasn't the one referenced by the recipe! It was too late in the day to call her and get the recipe, so I looked for other ideas. A slight adaptation of another frosting recipe for a Butter Rum Glaze led to my husband's announcement that this cake was possibly the best he'd ever eaten! Now I have a "secret" recipe of my own to share!