Whisk to incoporate. Cook, whisking often, until the sauce thickens to mimic the consistency of a true cream sauce. The sauce will seem quite runny at this point, but this is normal. This thick and creamy tahini alfredo sauce is a delicious pantry-staple twist on an Italian classic! You KNOW we love a good creamy pasta sauce around this homestead – I have tried so many different ways to make a thick and creamy non dairy sauce. An easy to prepare homemade, yogurt-based tahini sauce with lemon juice, parsley, and garlic that pairs well with many dinner meals, such as falafel or shawarma. We are going to thicken it next. Its great over pasta, as a dressing over falafel, or served with garlic pita bread. Sprinkle in the flour or arrowroot and turn on heat to medium-low. Transfer the tahini Alfredo sauce to a medium saucepan.