By now you know what makes Grub Burger Bar so special: the devoted teams, the big flavors, the welcoming atmosphere, the investment in its communities.

But this South Texas-founded restaurant is serving up even more, with a sweet new way to lend a helping hand, a loyalty program that really makes you feel special, and a kitchen that never stops cooking up limited-time-only items.

 Spread the Love, Share Pie
What would the holidays be without pie? Gift some of the Grub spirit by ordering a freshly made pie and knowing that part of your purchase is going to a good cause. To expand its Grub Gives Back program, Grub formed Happy Pie Company, whose first offering is a mouthwatering chocolate pecan pie. But here's the best part: $5 of each pie goes directly to your choice of either Children's Cancer Research Fund or the Boot Campaign, which provides life-improving services to military families nationwide.

Through the end of 2017 you can also get your pie in shake form, as chocolate pecan is Grub's current market shake. Come in to either The Woodlands or CityCentre location to try a shake or slice of pie, or place an order in the restaurant or online at happypieco.com for a full one that can be shipped to any of the 48 contiguous states.

 Grub Love
This isn't your average loyalty program. Grub Love understands your need for burgers, shakes, and Brussels sprouts, and rewards you with one point earned for each dollar spent with the Grub Love app. Fifty points equals $5 in rewards, and the points never expire. Plus, you can look forward to a free shake around your birthday and exclusive monthly offers. You can also purchase gift cards for friends, family, or yourself, and pay right from your app. Now through the end of the year, each gift card you buy through the app gets you an additional 10 Grub Love points.

Forget to tap "earn" when you ordered? No problem — you have up to three days to scan your receipt and receive credit. Share the love by referring friends, and earn points when they make their first purchase (your friend gets an extra 20 points on that first meal, too). Sign up for a Grub Love account here or through Facebook.

 Market Specials
Ever on the quest for perfection, the Grub chef is always experimenting in the hopes of finding the next new fan favorite. These limited-time-only meals usually change every few weeks, so it's worth popping in from time to time to see what's making its debut. Coming up next is the OMG Burger, which combines 100-percent ground beef, queso, chili, and fries.

But burgers don't get to have all the fun. The shakes also get the trial treatment (like the chocolate pecan pie shake that's here just in time for the holidays). If you really love something, let Grub know — it might just end up becoming a permanent part of the menu, like the Mac 'n' Cheeseburger did.