Blueberries or Gunk?
I too would like to know the answer to this — for example, are the “blueberry muffins” sold at Mugg & Bean made with real blueberries? Do blueberries even grow in South Africa?
Blueberry muffin from Cappuchino’s at The Grove.
Afterword
But right after posting this we went out shopping, and had breakfast at Cappuchino’s in The Grove Mall, and what did I have for breakfast but a blueberry muffin. I poked it and prodded it and disected the blueberries, and concluded that they were the real thing and not gunk.
But then I got home to read this: Big food companies want to call GMO foods “natural” | Grist. You win some, you lose some.
So I just saw this documentary at the gym where somebody said that the blueberries in blueberry muffins are not really blueberries bur, rather, some chemical gunk.
Is that true? Because that’s kind of icky.
Notes from underground 
Someone commented that with all the blueberries in our muffins, breakfast cereals and cakes there should be fields of blueberries on every street corner.
Apparently look at the labels. Blueberries should be down as ‘Blueberries’. Anything else like Blueberry flakes or the presence of blue colouring indicates that it’s a chemical concoction.