First, make the butter compound ahead of time.  Mix all the prepared butter compound ingredients together in a bowl until it is well combined.

Spoon the softened mixture in a log shape in a long sheet of plastic wrap.

Close the butter compound up by rolling the ends together and twisting the edges to create a butter log.

Refrigerate for a few hours until it hardens.  I left mine overnight.

Next, you will need to create the Roasted Garlic Aioli.  YUM!

I purchased already roasted garlic cloves for this but you can roast your own in the oven too.

Combine all the Garlic Aioli ingredients in a food processor and blend it on high until all the ingredients become smooth.

Now, separate the 80/20 ground beef into 4 separate hamburger patties.

Place a large slice of the seasoned compound butter inside each of the burgers (as shown in the photos below).

I love to use a cast iron skillet to cook these burgers up because the beef tastes absolutely amazing (yes, there is a difference).  Place another large slice of seasoned compound butter on the top of each burger while it's cooking.

Once the burgers are done, add a slice of your favorite cheese on top and serve warm!  YUMMY!