The document lists 10 foods that can cause acid reflux: oranges, grapefruits, garlic, onion, Mexican food, pepper, chili, foods with lots of spices, mints, alcohol, caffeinated beverages like soda, coffee and tea, chocolate, fatty foods, and large meals. Many of these foods relax the sphincter muscle between the stomach and esophagus, allowing stomach acids to flow back up into the esophagus and cause acid reflux.