Dissolve milk powder in chicken stock, then incorporate it into the batter.
You can find malted milk powder at your local market or you can order it online.
Butter in the EEC is 270% of the world market price; skimmed milk powder 330 %; and wheat around 150% .
If you 're very worried then substitute 1/2 cup of skim milk powder for 2 eggs, but do n't replace more than that.
Most restaurants don't keep malted milk powder on-hand so you have to make them at home.