large enough for 2 slices of bread at a time, use about a quarter of the butter (a little less than a tablespoon).
as soon as the butter melts, lay the pieces of bread on it and move them around a little so they soak up the butter.
let cook until the bottom sides of the bread are toasted. then transfer the toasted bread from the pan on to a plate for a moment.
add the remaining butter if your skillet is large enough for 4 slices of bread. if you're cooking two slices at a time, add about another tablespoon of butter to the pan.
next, put the slices of bread back into 