the 2 parts water to 1 part rice is defined by _weight_ not volume
in small volume quantities it "works" reasonably well.
amounts greater than one-half cup - 118 ml water - it does not work out so well.
I do the Alton Brown method:
2:1 - water:rice
for "brown" rice, add 10% water
bring the pot of water to a boil
add rice (salt/butter...)
when that comes back to a boil,
cover
put in (preheated aka already hot) oven at anything from 350'F/175'C to 425'F/218''C
small batch . . . 15 minutes in oven with 10 minute covered cool down
large batch . . . 20 minutes in oven with 10 minutes covered cool down.
do not uncover in or after oven
fluff up with fork immediately prior to serving.
dead nuts simple, works everytime for the last 15 years