One of the best ways to thicken your results was just claimed, to choose milk that has a higher fat content. But, there are actually other ways you can go about it. One of the best ways is to properly prep the milk before it ever goes inside the yogurt maker. What you want to do is boil it and then cool it so it drops down to 110 degrees. As a point of reference, the lower the milk is cooled, the thinner your yogurt will end up being.
In addition to this, look for yogurt starters that are designed to produce thick results. Of course, you can also add heavy creams and also Greek yogurts.