Me gusta el arroz más que lo que me gusta el pan.

[morbrorper]

English

I like rice more than I like bread.

I seem to recall that one should say “más de” when followed by a sub-clause.

[morbrorper]

English Translation

I like rice more than I like bread.

I’m still wondering.

[Daniel42]

I’d say ‘de’, never ‘que’ in this sentence.

[Karamy]

You’re correct; the 1st que should be replaced with de.