What is the In-N-Out spread made of?
                                
                                
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                                    4 min read                                
                            
                                Over 75 years, In-N-Out Burger has become famous for its simple menu and high-quality ingredients. A key component of its legendary flavor is the tangy, creamy sauce known as the "spread," leaving many to wonder exactly what is the In-N-Out spread made of. The closely guarded recipe is a proprietary twist on a classic Thousand Island-style dressing, built from common pantry staples.