E! News co-host Maria Menounos stops by the kitchen to make a delicious homemade Portobello mushroom veggie burger, and talks with Rachael about her lifelong love of cooking.

When Maria was a kid, she would make dinner for her working parents so that it would be ready when they got home. This kicked off a lifelong love of cooking that recently culminated in her new cookbook, The EveryGirl's Guide to Cooking.

Watch above for Maria’s delicious Portobello Mushroom Burger recipe, and watch the video below to see her introduce her sweet mother, Litsa.