how old was your flour?
flour that is out of date does some funky stuff to your baked goods -

the flour has been bought just this past month the date was OK I usually buy a bag at least once a month all ingrediges were new since Xmas

did you use a spread instead of real butter?

some called for butter another one called for half shortening and half margerine I used crisco and blue bonnet margerine I am going to try them again in a couple of weeks my husband has been putting a slice of bread in them to make the soft it works I don't eat much of what I make thank you will let you know next time I make them

today's margarines are not like the margarine from days gone by - it's no good and will ruin anything - try butter if the recipe calls for butter, and use shortening if the recipe calls for shortening
watch your baking time - try to take them out of the oven on the shorter baking time - they will still continue to bake while setting on your rack to cool
maybe you should switch to a different recipe for the same type of cookie and see what happens - somewhere there is a screw up of some sort on the measurements/ingredients - would you share the recipe so I can check it?