I have Four Corners

What five-letter word becomes shorter if you add two letters to it?

I am the seventh planet from the sun.

I have 27 moons. My nick name is "Ice Giant".

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?

I am in the kitchen. I have lots of food inside me.

I keep food cold.

What I am?