National Sofrito Day is observed in the United States every March 11 to celebrate sofrito, a popular condiment and cooking base in Mediterranean and Latin American cuisines. Sofrito is a mixture of finely chopped vegetables, herbs, and spices sautéed in oil, used as a flavor base for various dishes such as paella, stews, and soups. The origins of sofrito date back to the mid-14th century in Spanish cookbooks, initially consisting of diced onion sautéed in olive oil before the introduction of tomatoes and peppers in the 16th century. Variations of sofrito have emerged across different cultures, with Puerto Rican sofrito, known as recaito, typically including peppers, onions, garlic, and cilantro, while Colombian versions like hogao consist of tomatoes and scallions. To celebrate National Sofrito Day, people can prepare sofrito at home, host cook-offs, or purchase pre-made versions from local markets, sharing their experiences on social media with the hashtags #NationalSofritoDay and #SofritoDay.