What Am I Riddles

Question: While you were folding a letter I got you.
Usually you will do whatever it takes to avoid me,
but now you can't help but find me.

What am I?

Question: Smell me, buy me, and deliver me.
I won't change.

What am I?

Question: A five lettered word, I'm used to make bread.
Remove one letter and I'll burn you instead.
Remove two and do this to your stew.
Mix that around and a good drink we will brew.

Question: To look cool wrap me around your head.
Remove a letter and eat me instead.

What am I?

Question: You put me in hard.
But then I become soft.
Blow me hard and I will get bigger.

What am I?