Is there a visible difference between self-rising and all purpose flour?

Question

I put each type of flour into these pretty new canisters I got and forgot which is which. Now I need to bake a cake! Is there any visible difference or any way I can figure out which flour is which?

Answer 1

Dropkick almost got it! Stir the flours into some water, the self-rising will bubble and foam due to the baking powder in it, the AP flour just sits there. it's almost impossible to taste the difference in the two.

Answer 2

Maybe the self-rising flour will have a salty taste to it; if a recipe states all-purpose flour in the recipe, many times it'll say, "If using self-rising flour, omit baking powder and salt".

Answer 3

Taste them. There's not a huge amount of baking powder in the self rising, but you should be able to tell.

Answer 4

Mix a small amount with water and make a dough. Fry it. If it bubbles and rises you know which one it is.

Answer 5

http://www.joyofbaking.com/flour.html