Blueberries are probably the most affordable berries, at least here in Singapore it is. It usually came in a small box of 125g, but sometimes if you’re lucky, you can find a bigger packaging at a slightly lower price. Blueberries are one of the fruits that I’ve eaten the most. I always eat them with yogurt, oatmeal, or blend it with banana and turn it into what I like to call, a bluenana smoothie, and of course it’s a wonderful fruit to bake with. So when I got the book The Back In The Day Bakery Cookbook, the first recipe that caught my eye was the blueberry buckle. So what the heck is a blueberry buckle? Well it’s actually a single layer sour cream cake bursting…