Step 1 Combine the jalapeños, cilantro, garlic, mayonnaise, sour cream, chile paste, lime juice and vinegar in the jar of a blender and blend on high speed until smooth. With the blender running, slowly drizzle in the olive oil. Season to taste with one-half teaspoon salt and one-eighth teaspoon pepper, or to taste. This makes about 1 cup sauce, which can be stored in a sealed container in the refrigerator for up to 1 week.