'Cinnamon rolls!' Pregnant Chrissy Teigen goes from wearing a bra to no bra as she cooks up some sexy fun in the kitchen

PUBLISHED: 05:24, 18 December 2015 | UPDATED: 08:26, 18 December 2015

Chrissy Teigen's cookbook isn't even out for two months yet but it's already a hot seller.

The pregnant FabLife co-host gave fans a taste of what culinary delights they can expect in a couple of sexy Instagram posts on Thursday.

Chrissy was seen chowing down on tacos with her friends from the show and wearing just a bra and blue skirt in one snap, while she opted for no bra at all in the other picture showing her making cinnamon rolls in a plunging black dress.

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'Taco party!' Chrissy Teigen wore just her bra and skirt while chowing down on tacos behind the scenes at her show FabLife in this picture posted to Instagram

The 30-year-old, who is expecting her first child with husband John Legend sometime in the spring, certainly satisfied her food cravings.

Chrissy dug into tacos behind-the-scenes while looking pretty in that flesh-hued brassiere, and giving the camera lens a seductive look.

'Taco party... love all of you!' Chrissy wrote.

'Cinnamon rollllllsssssss!!!' The mom-to-be opted for no bra with her plunging black dress while whipping up a batch of baked treats on Thursday

Gooey goodness: Chrissy put on a Santa's hat as she drizzled glaze on the rolls in a short video

Big reveal: The Sports Illustrated Swimsuit model demonstrated ladling techniques

Chrissy then shared a revealing snap of herself in the kitchen whipping up a batch of tasty treats for her television cohorts.

This time, Chrissy ditched the bra entirely and showed off her daring décolletage in a plunging black frock that a black-striped blazer did little to conceal.

'Cinnamon rollllllsssssss!!!' the mama-to-be shared in the picture's caption, which was soon joined by a video in which she drizzled glaze over the baked goods.

Hummingbird: Chrissy hummed a little tune while looking festive in her Santa's hat

Prepped: The FabLife co-host got ready for the day's taping

Chrissy got into the spirit by donning a Santa's hat and humming a tune while in the background a TV could be heard.

'Bringing some goods to the @fablifeshow holiday party!' the Sports Illustrated Swimsuit model informed her followers.

Chrissy's cookbook Cravings hits shelves on February 23 and it's already hit number one in the presale on Amazon.com.

Yum: Chrissy gets to cook up all sorts of fun with co-host Joe Zee

Hot seller: The food-loving Chrissy has a cookbook called Cravings coming out on February 23 but it's already a number one seller during the presale on Amazon.com

The model-turned-social media butterfly gushed to Vogue that she is a 'huge fan and admirer' of Food Network chefs Giada De Laurentiis and Ina Garten.

Chrissy told the magazine: 'My biggest fear was looking like this book was shoved out by some model who pretends to eat pizza and pokes around at things in the kitchen. I wanted to prove to people that I have a real passion and love for food.'

Earlier in the day, Chrissy posted a picture of herself in the make-up chair.

'Getting close to show time!! Love my team!!,' Chrissy wrote, adding the following as a shout-out: '@jenloura @makeupbyliz @acuvue #BeautyDEFINED #sponsored'