I went 1/2 materials to 1/2 oil in my last batch, which worked best yet. That batch was actually 100% ABV, no fresh included. But I used A LOT of ABV. You may find your own preferences. It was pretty strong though, man. Im a big dude with a big tolerance, and they made me feel pretty good. Food highs, while I like them, tend to hit me a little differently then most people it seems. My friend, who is about half my size and is a much more casual user, was in space for almost 5 hours, and she started feeling it pretty quick too. Like within 20 minutes. 1/2 of post-ground materials may be too much for some, I don't know. Without knowing how much you vape your stuff or what kind of stuff you use, I mean the end result is rather unpredictable. Maybe try 1/4 cup of materials your first time? If it's too weak you could always just eat more brownies, and then next time you'll knwo to make it twice as strong. BTW your suggestion of Coconut Oil is a good one. I used Cannola oil because well, it was cheap, easy to find, and I bought it before I discovered that many cannafoodies prefer Coconut oil.