Cooking beans - what is that grey froth on top?

[UglyCasanova]

I'm cooking some read beans at the moment, and once again I've got this grey bubbly froth forming on the top. What causes this? They are cooking in a cast iron dutch oven, so could it be due to that or is it due to the beans themselves? I can't remember if this has happened with other types of beans, but I think it did with black eyed peas.

 

[Whoozyerdaddy]

Don't worry... it's the AIDS boiling off.

 

[techs]

Semen.

 

[Texashiker]

Its the fat cooking off of the beans.

Next time, buy skinny beans instead of fat beans.

 

[spidey07]

Protein.

 

[Leros]

Protein.

Yup. Proteins tend to foam up like that

 

[Howard]

Protein.

sorry

coudln't help myself

 

[Cerpin Taxt]

Adding a little oil to the water will help keep that down a bit.

 

[MagnusTheBrewer]

Yup. Proteins tend to foam up like that

On a side note, if you cook beans in a pressure cooker, remember to use some cheese cloth so the foam doesn't carry the bits of skin and clog the pressure valve. Don't ask me how I know this.

 

[Leros]

On a side note, if you cook beans in a pressure cooker, remember to use some cheese cloth so the foam doesn't carry the bits of skin and clog the pressure valve. Don't ask me how I know this.

Reminds me of my friend who was fermenting a fruit beer in a small plastic carboy. Pieces of fruit clogged up the valve and the carboy exploded from the pressure.

 

[feralkid]

On a side note, if you cook beans in a pressure cooker, remember to use some cheese cloth so the foam doesn't carry the bits of skin and clog the pressure valve. Don't ask me how I know this.

Good advice.

 

[spidey07]

On a side note, if you cook beans in a pressure cooker, remember to use some cheese cloth so the foam doesn't carry the bits of skin and clog the pressure valve. Don't ask me how I know this.

Kaboom?

 

[moshquerade]

dirt

 

[tcsenter]

Starches

 

[The Boston Dangler]

Protein.

Starches

yes

 

[sandorski]

Starches

This. Nothing to worry about.

 

[IronWing]

It might be frost. Are they perchance chili beans?