The noun 早餐 (zǎocān) means "breakfast," the first meal of the day. It is a slightly more formal synonym of 早饭 (zǎofàn), and is commonly used in both spoken and written Chinese. For example, 回到早餐 means "returning to breakfast."
你今天早餐吃了什么?
Nǐ jīntiān zǎocān chī le shénme?
What did you have for breakfast today?
我每天早餐都喝一杯牛奶。
Wǒ měitiān zǎocān dōu hē yī bēi niúnǎi.
I drink a glass of milk for breakfast every day.
酒店的早餐种类很丰富。
Jiǔdiàn de zǎocān zhǒnglèi hěn fēngfù.
The hotel has a great variety of breakfast options.
你今天早餐吃了什么?
nǐ jīntiān zǎocān chī le shénme?
What did you have for breakfast today?
我每天早餐都喝一杯牛奶。
wǒ měitiān zǎocān dōu hē yī bēi niúnǎi.
I drink a glass of milk for breakfast every day.
酒店的早餐种类很丰富。
jiǔdiàn de zǎocān zhǒnglèi hěn fēngfù.
The hotel breakfast has a great variety.