Homemade yogurt is not going to be as thick as store yogurt. Store bought yogurts use fillers and thickeners like powdered milk, corn starch, etc. DO NOT add powdered milk. It isn't real food!* Pectin is a thickener added to one of my favorite yogurts (Greek Gods Plain Greek Yogurt), but the BEST way to thicken your yogurt is just to drain it in some cheese cloth. The longer you leave it drain, the thicker it gets.
To make your own greek yogurt, use cream instead of milk. You can use all cream or replace half the whole milk with cream.
*"oxidized cholesterol, found in most powdered milk and powdered eggs, contributes to heart disease. Powdered milk is added to 1% and 2% milk."
http://www.westonaprice.org/brochures/wapfbrochure.html
To make your own greek yogurt, use cream instead of milk. You can use all cream or replace half the whole milk with cream.
*"oxidized cholesterol, found in most powdered milk and powdered eggs, contributes to heart disease. Powdered milk is added to 1% and 2% milk."
http://www.westonaprice.org/brochures/wapfbrochure.html