What Comes Once, Twice and Never

I am found in the freezer. I taste good on a sunny day.

I come in many different flavours. I am made of cream.

What am I?

It is Orange. It is big and thick.

It is a popular vegetable in autumn and spring. 

You can carve it in Halloween.

What is it?

I am the fifth planet from the sun.

I am the fastest spinning planet in the solar system.

Who am I?

I eat other animals. I have a big mouth.

I am green. I live in water.

Who I am?

I am sweet. I come in different flavours.

I usually have icing on top. I am served at birthday parties.

What am I?