Ice cream by local favorite Sweet Firefly is partly what makes these shakes — like the Whiskey Banana Split shake — delicious. Booze is the other part.

Grub Burger Bar has plenty of shakes to go with its long list of burgers. Try the Dirty Kitchen Sink, which blends chocolate vodka, pretzels, peanut butter, salt, butterscotch sauce, caramel sauce, chocolate chips, coffee grounds, and potato chips.

Wild About Harry’s, founded by the late Harry Coley, Jr., has been in the custard game for twenty years. So obviously, the shakes served there are nothing to sneeze at. Take, for example, the Captain America: vanilla and chocolate custard, plus Hershey's syrup, vanilla syrup and sprinkles.

The most nostalgic of the bunch, the shakes and malts at the Highland Park Soda Fountain are made the old fashioned way, because they’ve been doing it that way for more than a hundred years. Since this soda fountain is closing in September, now’s the time to grab a spinny stool and a straw and sip on history over on Knox Street. Choose between vanilla, chocolate, strawberry, pineapple, cherry, or butterscotch flavors. (Cherry is the owners’ favorite flavor we’re told).

Hopdoddy's menu of spike-able shakes are pretty rad. The secret, we’re told, is the vanilla-cinnamon ice cream base. Hopdoddy’s seasonal editions tends to grab the most attention, last fall a white chocolate cranberry made a perfect sweet-tart accompaniment.

Liberty Burger is a small chain of family-friendly, neighborhood spots with great burgers and shakes with something for everyone. Case in point: the Lebowski shake made with custard, Patron XO Café, and coffee.

This dessert-focused spot in West Village has a substantial menu, much of which is devoted to Instagram-worthy, chocolatey goodness. The latest group of Grand Chocshakes, topped with towering cake slices, waffle cookies, and mini ice cream sandwiches are among the most drool-worthy.

No meal at Shake Shack is complete without a shake. Fun fact: All the sweet treats at Shake Shack start with a base of cinnamon-vanilla custard before they spin it into something even more special like strawberry cookies ‘n’ cream.

The folks at The Royale are having almost TOO much fun dazzling patrons with their shakes, most of which are available with booze for a buck fifty more. The most “royale” of the bunch? Perhaps it’s The Magnificent S'mores Shake, which stirs up chocolate ice cream, fudge, and toasted home-made jet puff with a graham cracker rim.

This family-friendly burger spot has a surprisingly solid bunch of shakes to please sweet tooths of all ages. Try one of eight delicious house creations, or concoct your own from ingredients like peanut butter, white cake mix, and gummy worms.

Another serious contender in the adult milkshakes category, Cane Rosso’s location at The Star in Frisco has partnered with Cow Tipping Creamery to create the following crazy shakes: Pina Cow-lada, Pancakes & Sizzurp, and the Old Fashioned Shake, all with booze, of course.

Slater’s 50/50 puts bacon in pretty much everything, and before you ask, yes, there is a bacon milkshake — two, actually. Shakes are available boozy or straight and without bacon as well, including a tasty Pop-Tart shake.

Lowest Greenville houses the latest Creamistry operation, where vegans might discover their new favorite shake. The nitrogen-frozen ice cream shop serves up a vegan-friendly shake made with a non-dairy coconut base, spiced up with more than two dozen flavors and countless toppings.