The sauce is spicy, smoky and slightly sweet just like the real deal. Typically, I spread this on a tortilla in a fry pan. Everyone agrees that at Taco Bell, the quesadilla sauce is BOSS. Then I add cheese and layer with another tortilla. Combine yogurt with taco seasoning. Make sure not to buy the pickled jalapenos. DIRECTIONS. Let it develop for an hour in the fridge, then use it to make any quesadilla. How to Make this Copycat Taco Bell Quesadilla Sauce. Once both sides of the tortilla are crispy and light brown it is ready to eat. You will need the following ingredients to make this Copycat Taco Bell Quesadilla Sauce: Sour Cream, Mayonnaise, Jalapeño, Garlic Powder, Ground Cumin, Paprika, Cayenne Pepper and Salt. Refrigerate for at least half of an hour. It’s the perfect compliment to our favorite chicken, bacon and black bean quesadillas but it’s good on any crispy, tortilla creation. Keeps 1 week covered in the fridge. In … It takes only 5 minutes to mix up. Mix all of the ingredients very well and enjoy. I cook the quesadilla in a bit of oil on medium-low heat. This easy recipe combines sour cream and mayo, jalapeno pepper and spices: ancho chili pepper, garlic powder paprika, salt and a dash of cumin and cayenne pepper. At first the ingredient list may seem a little weird but trust me, it comes together into the perfect copycat taco bell quesadilla sauce.