Answer:
A time when they're green. A time when they're brown. But both of these times, cause me to frown. But just in between, for a very short while. They're perfect and yellow. And cause me to smile.
It's a symbol and a fruit, For man's folly, evil's root. But also for great inspiration, and famous application.
I'm a soft, sweet food made from a mixture of flour, shortening, eggs, sugar, and other ingredients, baked and often decorated.
I add lots of flavor and have many layers, but if you get to close I'll make you cry. What am I?
What nut has a hole and is squishy?
What goes around and around the wood, but never goes into the wood?