This is really just a model of a wedding cake I dreamed up. If it were a real cake, I imagine the bottom and top layers would be plain white cake with buttercream frosting as a filling, covered in white fondant. The middle layer would be white cake with a blueberry filling, covered in blue fondant. The flower topper's petals would be made of stiff icing, and the gold in the center would be a a ball of glittering spun sugar. I may update later with a screenshot to show what a "slice" of the cake would look like. For now, enjoy!