Three years ago I kicked off this blog by posting Black Magic Cake. Now it’s back as my daughter Claire’s wedding cake. Claire didn’t exactly ask me to bake the wedding cake. She asked me to take charge of getting enough Black Magic Cake for the wedding. I think she envisioned friends and family dropping off cakes in various pan sizes at a designated table. And yet, despite my inability to do anything with buttercream frosting other than get it in my hair, I wanted to bake her a real wedding cake. This would be a challenge. I’ve never watched more than five minutes of “Ace of Cakes.” Claire is smart, and knows that…