If my brownie mix only calls for water and oil and I made butter do I still use both water and oil?

Yes to the water. The water is necessary to moisten the batter and activate the dry milk & eggs pre-measured into the mix. As far as the butter and oil.

You "can" substitute the butter for the oil. I would not. I would add both at equal amounts, if it were me.It will only make the brownies softer or may even make it a little greesy but you cant hardly mess up a brownie unless you over cook it.

I add hershey chocolate syrup to mine as well. The syrup makes the brownie a little more richer, if thats possible.

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