Boo appetit!

Americans are expected to spend a record $9.1 billion celebrating Halloween this year, so restaurant chains are looking to scare up some extra business through Tuesday with tricks and treats. And some members of the monster mash look pretty ghastly.

Starbucks is leading the way with its new zombie frappuccino, which blends tart apple and caramel for its greenish-brown body, and tops it with pink whipped cream “brains” and red mocha drizzle.

If that doesn’t make you feel a little green around the gills, one eagle-eyed customer pointed out that it packs 54 grams of sugar.

Speaking of sweet stuff, kids 12 and under who come to IHOP between 7 a.m. and 10 p.m. on Halloween get to decorate (and eat) a free Scary Face Pancake using strawberries, whipped topping, Mini Oreo cookies and candy corn. They’re also invited to share their crepe-y creations on social media with the hashtags #ScaryFacePancake and #Entry for a chance to win prizes.

Or what about making a meal out of mealworms? Melbourne burger chain Huxtaburger is upping the gross-out factor with a Halloween-themed Bugstaburger, which is made of edible insects. The patty is topped with mealworms and ant mayo, and sandwiched in a blue bun, which is being dished through the 31st.

Of course, edible insects like roasted grasshoppers (chapulines) and cricket protein bars are crawling all over restaurant menus and store shelves right now – if you’ve got the guts to give them a shot.

If you’re craving more familiar fare, participating Burger King stores near Miami, Boston, L.A., Austin and Salt Lake City will give a free Whopper to the first 500 customers who come dressed as clowns on Halloween. And they’ve even taken advantage of the holiday to troll their arch rival McDonald’s signature mascot, Ronald McDonald. Burger King wraps its scary clown spot with someone dressed in a creepy Ronald costume, along with the tagline: “Come as a clown, eat like a king.”

If Chipotle’s past salmonella outbreaks haven’t scared you off, come to the Mexican grill in costume on Halloween to get $3 burritos (sorry, “Booritos”), plus a chance to win a year of free burritos by texting “BOORITO” to 888222 by Oct. 31.

And Baskin-Robbin’s has added a Fang-Tastic Monster Cake, and scooping a new Candy Bar Mashup ice cream whipped from Snickers, Milky Way and Twix bar pieces in chocolate ice cream with caramel.

The Baskin-Robbins Fang-Tastic Monster Cake (Baskin-Robbins)

Plus, on Halloween, guests at participating ice cream shops can get any regular or kids-sized scoop for just $1.50.