I tried the strong bread flour in making chocolate chip cookies, and they were soft and delicious, even the next day, with crisp edges. Still, they were very flat.
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I think I will do what Elynor suggested next time and add a bit extra flour and see what happens. The batter was very moist, more so than usual, but I used this recipe and just subbed the strong bread flour and added a 1/2 tsp of baking powder by mistake (read the recipe wrong and added that instead of baking soda, but then added the baking soda once I realised what I did and continued as normal.)
http://southernfood.about.com/od/chocchipcookies/r/r90510f.htmAlso, they seriously could've used more chocolate. I used the Cadbury chocolate chunks for baking and they didn't get all gooey like I would've liked.
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I wrote down everything I did as experiment one and figured I could just change something each time and compare notes until I get it right.
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