Deviled Eggs Dry Mustard Substitute?

I'm making Deviled eggs and I don't have dry mustard, but I was wondering if i could substitute 1/2 teaspoon dry mustard for 1/2 normal yellow mustard....because if I buy dry mustard I won't ever use it again and I'm big on saving every penny...so can I substitute it with regular yellow mustard?
12 answers 12