My Detroit area readers will recognize this one...and for those of you who aren't from this area, I will post a pic below showing you what a Sanders Bumpy Cake is.
My mom worked at Sanders when she was a teen. For that reason, we have a couple of their recipes in our arsenal (keep an eye out for Sanders' Hot Fudge!). I'm not sure if this is actually FROM Sanders, but it is from a friend of my mom's who *I believe* worked there, too. If not, I'm sure mom will chime in and let me know. If nothing else, they did ride the bus together!
Anyway, a Sanders Bumpy Cake is legendary here in the Detroit area. They're pretty simple, kind of like a hostess cupcake as far as taste goes. It's a devil's food cake, topped with buttercream (in a "bumpy" pattern), which is then topped with a chocolate icing.
hhhmm...now that I look at a "real" one, I kinda wish I did mine different....oh well! So, that's what a Sanders Bumpy Cake looks like. Here is mine...note that I didn't really do the "bumps" on mine...well, ok, I *tried* to do the bumps, but I think it was just too warm for the liking of the buttercream today.

Not too shabby, eh? It was *very* tasty. I think this is what Ugg will be requesting for his birthday this year!
So...here is the recipe (ok, I'm writing it as my mom wrote it...but geez...Mom, I love you, but more specifics would be good!) -- bolding my additions/clarifications.
Sanders Bumpy Tea Cake
Mix and cool a chocolate cake in a 9x13" pan -- ok, I used a boxed devil's food cake, but followed The Cake Mix Doctors recipe for Chocolate Buttermilk Cake
Buttercream:
1 stick of butter
1/2 c shortening
1 c sugar
1t vanilla
2/3 c hot milk
Mix butter, shortening and sugar until smooth, then add hot milk. Mix on low until thick and creamy - takes a long time - ok, really, Mom? "takes a long time"? I mixed for about 15 minutes. Spread on cooled cake (or pipe to make "bumps"), and freeze until set (I froze for about 30 minutes)
Chocolate Icing:
4 T cocoa
2 T oil
2 T + 4 t water (these measurements kind of amused me..but not really, since the first time I did it using 2 + 4 TABLESPOONS - instead of 4 TEAspoons)
2 T dark corn syrup
2 C powdered sugar
Mix all except sugar in a saucepan and heat, stirring, until hot. Mix in sugar and stir (I whisked..you should too, makes it WAY easier/faster) until smooth. Pour over buttercream and refrigerate.
So, there you have it...one of my old family recipes. Keep an eye out for more. I'm planning a mac and cheese casserole that everyone loves (and is way easier than regular mac and cheese), scotch shortbread, rice pudding, French Canadian meat pies....and any more that may strike my fancy.
Enjoy this one! It's a real treat...and THANKS MOM for letting me use your recipe file!