" I can't imagine that the brand of flour would have made much difference in the taste of the biscuits. Maybe so if the biscuits had been eaten alone by a flour connoisseur, but with the savory meat, the relative smallness of the biscuits, and the generous application of butter, there wouldn't have been much room for ordinary eaters to detect subtle differences in the flour, if there even were any differences. "
Both brands of flour I mentioned used soft red winter wheat.
Soft wheat is, in fact, the key to understanding why the South is better known for cakes, biscuits and pie crusts than for yeast breads, which require the strength of high-protein flour. Soft red winter wheat was once grown primarily in the Carolinas, Georgia and Tennessee and, in the days before national food distribution networks, it was the only wheat widely available in the South.
http://www.nytimes.com/2008/06/18/dining/18flour.html?pagewanted=all
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Not all flours are created equal. Southern bleached all-purpose flours are made from the soft winter wheat that grows well in the warmer southern climate while northern all-purpose flours are made from the hard spring wheats that grow in the colder climate. Strains of soft winter wheat have less protein than the hard spring wheat and therefore southern all-purpose flours are better-suited for quick breads such as biscuits, cakes and muffins.
Here’s a quick rundown of some flours and their protein contents, taken from the book Cookwise by Shirley O. Corriher:
Cake flours (Swans Down, Softasilk):
7.5 to 8.5% protein
Bleached southern all-purpose (White Lily, Martha White, Gladiola, Red Band):
7.5 to 9.5% protein
National brand self-rising (Gold Medal, Pillsbury):
9 to 10% protein
National brand bleached all-purpose (Gold Medal, Pillsbury):
10 to 12% protein
Northern all-purpose (Robin Hood, Hecker’s):
11 to 12% protein
Northern unbleached all-purpose (King Arthur):
11.7% protein
Bread Flour:
11.5 to 12.5% protein
So, keeping in mind that less protein equals light and tender cakes and quick breads, the flours from the top of this list are going to give you the best results for those types of baked goods. And since more protein equals higher rising yeast breads, the flours from the bottom of the list will be best for those.