Do you have to skim chicken stock?

Online Answer
It's necessary to skim the fat as you boil down stock to preserve the integrity of the flavors. You want the pure, meaty essence of the bird and the earthy goodness of the vegetables to shine through, not the fat. So there's no way around the task, but let's be frank—skimming the fat can be a major pain in the tush.
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Yes you can but using milk rather than water will change the texture and consistancy of the dough.
If a baking recipe calls for whole milk, you may be able to substitute a low-fat milk variety like skim, 1% or 2% fat. Be cautious about substituting skim milk in pudding, custard and sauce recipes. These recipes rely on the dairy fat for added texture and flavor..
it prevents the solids from breaking up and messing up the clear stock. If you don't skim, you end up with tiny bits floating all through the stock, and it can have a distinct and unpleasant off-flavor..
Skim the fat off the top of the broth and discard it instead of eating it (this is the easiest route!). We can scoop off the oily layer while the broth is simmering, or remove it after refrigeration when the fat hardens and turns whitish or yellowish.
If a baking recipe calls for whole milk, you may be able to substitute a low-fat milk variety like skim, 1% or 2% fat. ... These recipes rely on the dairy fat for added texture and flavor. Baked items such as cakes and cookies can usually tolerate the use of low-fat milk..