How you eat is how you live.
Let's eat well together.
Sign up for our useful and inspiring emails.
Get a $10 credit at Provisions,
our new kitchen-and-home shop, launching soon!
Well played.
You deserve a cookie.
We'll email your $10 promo code when we launch.
Just some logical guesses: Off flavors could be anything: age; storage conditions; type of leavening in the SR flour; etc. Fluffiness could be because SR flours likely are low protein, as SR flours are more likely substitutes for cake flour than for AP or bread flour.
Four guesses: Old flour = rancid flour = off flavor. Self-rising flour typically has salt added to it in addition to the leavening so that might have been a factor in both flavor and texture. The flour could simply have had more or less leavening than your recipe calls for. Bleaching changes flour to a discernible extent and most self-riding flours are bleached.