The phrase "good whisk" refers to a kitchen tool called a whisk that is well-made, effective, and helpful for mixing or beating ingredients smoothly. Full definition
Ensure also that you give the eggs a really good whisk before adding to the pan to allow for a nice fluffy texture. (drstevenlin.com)
Well whisked eggs will make a fluffier frittata. (fasttofresh.com)
Give the cornmeal mixture one more good whisking, then carefully pour prepared cornmeal batter into hot griddle and spread evenly with spatula. (thegoodheartedwoman.com)