I can be white or dark, I am sweet and sometimes bitter and you see me on a cupcake or in a cookie. What am I?

Answer: Chocolate

More What am I ? with answers

More What am I ?

I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown the more I am used. My favorite colors are yellow and white, and I love stripes and dashed lines. What am I?
I can be written, I can be spoken, I can be exposed, I can be broken. What am I?
I can bring back the dead and a tear to your eye. A stir of emotions will follow close by. What am I?
I can bring tears to your eyes; resurrect the dead, make you smile, and reverse time. I form in an instant but I last a lifetime. What am I?
I can burn your mouth and sting your eye, but I am consumed everyday. What am I?
I can cycle many hours but I don’t get tired even at the end of the day. What am I?
I can fall off a building and live, but in water I will die. What am I?
I can fall off a building and live, but put me in water I will die. What am I?
I can fill a house or fill your mouth but you can never catch me in your hands. What am I?
I can fill a room but take up no space. Look out at night, and I am in no place. What am I?
I can fill any space, float, and disappear. Never touching the ground I help others get around. What am I?
I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?