I used half butter and half olive oil. Didn`t have fresh marjoram so I subbed it with oregano. I used a scallion in place of the chives. I just can`t make anything without garlic so the optional garlic was not an option. I used this butter to saute your shrimp in Aegean Shrimp Salad Aegean Shrimp Salad. It was soo good!