Size does matter...when it comes to Sweet Potatoes

When I saw the recipe for a sweet potato cake for our Venice lunch I thought "awesome - vegetables and sugar together". The recipe looked so simple - some flour, sugar, eggs, bit of butter, apples and raisins... and four large sweet potatoes.

I didn't think about having a  conversation with myself full of double entendre about "what is large?" I just went down to woolies, bought the four largest sweet potatoes I could (totalling to 2.2kg) and went through with the recipe. The result was mashed sweet potato that had been cooked for an hour and was a bit brown around the edges.

When I unclipped the spring cake tin, the cake sunk by about an inch and spread on the plate.

So it made me think - what is large?

Well it turns out a very similar recipe suggests 2 cups of cooked peeled sweet potato. Once again, the book needs to be verified.

Buon Natale - Veneto