need help with baking cookies

many times I bake cookies they tend to become puffy in appearance instead of spreading flat. how can i keep this from happening?

Its happend to me. Some technique loss maybe. And now I’ll ask to my Mom…She’ve more experience about it. may be I will post later…

or everyone can give tips?

Sounds like you are not measuring correctly. Are you using a measuring cup and leveling off flour? or scooping and dumping? ALWAYS measure carefully when baking! Anything else you can get by eyeballing ingredients.

If that is not case, you may be over mixing batter.

Hope this helps!