True, but I can still make far superior chocolate-chip cookies (an American staple pastry) at home, for cheap, than I've ever had from 90% of stores and bakeries.
Try out the following recipe with the addition of half a lemon's juice, switching out all the sugar for brown sugar. You can either use the full load of chocolate chips, or substitute dark chocolate, or do like I do and half the chocolates so you can enjoy the cookie.
http://allrecipes.com/recipe/10813/best-chocolate-chip-cooki...
(Mind, I might be an edge-case, since I've practiced baking since I was five years old.)
In any case lots of times, after you get to know the recipe, you just eyeball the proportions. No need to be super precise in most instances. We're not making alloys.
A pastry out of the oven is delicious. Which is why pastry made in house taste better than the hours old stuff you get at chain coffee shops.