Depends on your microwave. With mine I have to do them in 3 batches (they don't all fit at once)...
About 1.5mins... if I leave them in for 2 mins they often burn... 1 min and they're soggy... it's quite an art. Don't get distracted or you burn your dinner (or 1/3 of your dinner)...
They're dry obvs so you'll need a drink with them.