Melba's Jammin' wrote:

> You folks know stuff: What's acidic in a peanut brittle mixture (sugar,
> corn syrup, nuts, vanilla) that would cause it to foam when baking soda
> is mixed in? It's assumption on my part that the soda is neutralizing
> acid (I'm thinking about what happens when I add a bit of soda to my
> tomato sauce to reduce it's acidity.)

I'm not them, but the alcohol in the vanilla extract is a bit acidic.
Edrena