What Am I Riddles

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?

Question: No matter how hard you try,
I can open what you can't.
If it wasn't for me,
on your front porch you would stand.

What am I?

Question: I have no wallet but I pay my way.I travel the world but in the corner I stay.

What am I?