My dog ate chocolate, will he be ok?

I have a Siberian Husky and I left him home today and he got on the counter and ate some brownies and chocolate chip cookies. he ate them about noon today. I don't know how bad it is for him, but i know that chocolate can kill dogs and i'm worried about him. he isn't acting weird, but i just want to make sure he'll be ok. He is about 37 pounds and a healthy dog. Should i take him to the vet as soon as possible or will he be ok? please help me out