Here's how I do it, this should be enough batter for a couple pounds of fillets, you can also use it to make onion rings and fried mushrooms too!
For fish, this is very important.... Cut into "bite sized" pieces. (About 1" X 2" or so) Anything bigger or thicker won't cook all the way through.
1 Cup of Bisquick
3 eggs
1/2 cup of beer or 7up
1/2 tsp salt
1/4 to 1/2 tsp black pepper
1/4 tsp Cayenne red pepper
1/4 tsp Paprika
1/4 tsp Thyme (this spice removes or reduces the fishy taste)
1/2 tsp cooking oil
Mixes up like pancake batter. Thin with beer or 7up if needed, thicken with more Bisquick if needed. (This is to your own preference)
Drop your bites into the batter and stir to coat them (or onion rings or mushrooms) then use a fork to lift them out of the batter and GENTLY into the hot grease. After you get 6 or 8 pieces in the grease, tap them on the edges one at a time with your fork to make them turn over and the golden brown side will now be on top. (They are floating on top when you tap them) Then "rescue" them one or two at a time as they are golden brown on both sides, drain on paper towels. It doesn't take long!
Uh oh! I have to go! I'll be in the kitchen for a while if anybody needs me!
Here's what it looks like.
http://crappiemagic.com/batterup.jpg
I'll see you at the lake!
Mike