Preheat oven to 350°. Take out a nonstick 13-by-9-inch metal baking pan and set aside.
Cream butter and sugars with an electric mixer at high speed until fluffy. Add baking soda, cinnamon and salt, then mix at low speed to blend. Add eggs and vanilla extract and beat at medium until just incorporated. Add flour and mix on low speed until blended.
Scrape dough into pan, smoothing it in an even layer. Bake until lightly golden and set in center, about 30 minutes.
Transfer pan to a rack, and if desired, sprinkle cinnamon-sugar over warm bars, and then let cool completely. Or dust cooled bars with confectioners' sugar. Cut into 40 bars.
I think 2 sticks of butter is too much. Will try sour cream next time as another reviewer suggested. Wonderful flavor, easy, had all the ingredients on hand. Put the cinnamon sugar on when bars had cooled a little. A definite repeat.
These bars were so quick and easy to make and tasted just like the cookies! I put frosting on top of the cooled bars because I had some I needed to use up and then sprinkled cinnamon sugar over the top. So good!
These are so easy to make. Use a disposable foil pan sprayed with Pam cooking spray for easy removal. They smell wonderful as they bake and they are really good with coffee. I didn't care for them much a day after baking, but my husband ate every single one. Very easy to make and I would make again for a brunch.