Optional 'pad of butter'
If you tolerate dairy and are interested in topping this with butter, have at it! But if you're dairy free like my family, here's what I do instead. I line a small jar with parchment paper, and fill about 1/4" the way up with beef tallow and freeze. When it's completely solidified, I remove the parchment from the jar, and cut a couple "pads of butter" out of it. Easy peasy!
The small jars I use are intended for baby food, but I find them so useful for non-baby food storage.