This is a phase 2 multisite study that will be conducted at two centers in the U.S. All subjects will receive oral immunotherapy for their specific food allergies (peanut, milk, egg, soy, wheat, cashew, walnut, almond, hazelnut, cod, salmon, sesame, shrimp). All participants will receive three doses of Omalizumab 4 weeks apart over 8 weeks. The subject's allergens will be introduced after receiving the third omalizumab dose. Subjects will return to clinic to escalate the dose of their allergens until 300 mg (group A) vs. 1200 mg (group B) total protein daily dose is reached. There will be equivalent allergen protein portions depending on test allergen per each subject's history. Subjects will be randomized 1:1 to either group A or group B after meeting eligibility criteria. All subjects and study personnel will be blinded to group A vs B.