I couldn't find un-salted macadamia nuts. If you can, you may need to add a pinch of salt to the butter if you use unsalted nuts.
Additionally: If you want this butter to be STRONG on the macadamia flavor, you can use 1 1/4 cups cashews and 3/4 cups macadamia nuts. I tried this, and liked it. But I liked a little more cashews better.
*I bought toasted nuts, and toasted them AGAIN, because it really adds a huge depth of flavor. Don't skip this.
***When you add the extracts the butter does get quite thick. So, if you're one of those people that likes nut butter liquid-y and drippy, this may not be the nut butter for you! Alternatively, if you want it more spreadable, just microwave it for a few seconds!