Sugar Cookies

I’m craving some — with frosting … sigh … I haven’t mastered baking cookies.  My success rate is about 25% when it comes to cookies.  Something goes awry with the chemistry and they end up dense, doughy, or bitter — indications of a baking soda/baking powder imbalance.  Maybe I’ll just get a cookie and tea at my local coffee shop.  Do any of you have any remedies for cookie chemistry?  Please do share.