Reddit reviews Sara Lee Red Velvet Layer Cake, 53 Ounce -- 4 per case.

I'd believe 500 too ... it's hard to know ... but 150 error bar in a week where you'll eat 8500-14000 calories isn't anything much.

• http://www.walmart.com/ip/Entenmann-s-Red-Velvet-Iced-Cake-18-oz/21777411
  
• http://www.amazon.com/Sara-Lee-Velvet-Layer-Ounce/dp/B00B04C5NU
  
  These aren't great substitutes and some commercial cupcakes go pretty big. Not saying you're wrong, this really is as squishy as it seems.
  
  Here's a 500 calorie one
  
  
• http://www.walgreens.com/store/c/good-%26-delish-cupcake-red-velvet/ID=prod6092272-product
  
  And one that's 170!!!???
  
  
• http://www.brandeating.com/2015/02/review-hostess-red-velvet-cupcakes.html
  
  
  Here's one that might help the Mini-cupcake problem...
  
  
• http://www.target.com/p/red-velvet-mini-cupcakes-12-count-market-pantry/-/A-14827467#prodSlot=_1_4
  
  
  Edit: stream of updates because Google