ryourikyoushitsu de naratta pasuta ya piza o kazoku ni tsukutte kureru node, totemo tasukarimasu.

She makes the pasta and pizza she learned at the cooking class for the family, so it helps a lot.

Breakdown of ryourikyoushitsu de naratta pasuta ya piza o kazoku ni tsukutte kureru node, totemo tasukarimasu.

• を: direct object particle
• で: location particle
• に: indirect object particle
• 作つくる: to make

Questions & Answers about ryourikyoushitsu de naratta pasuta ya piza o kazoku ni tsukutte kureru node, totemo tasukarimasu.

In this sentence, who is actually doing the action? There’s no subject like “he” or “she.”

Japanese often omits the subject when it’s clear from context.

In 料理教室で習ったパスタやピザを家族に作ってくれるので、とても助かります。, the implied subject is something like “my daughter,” “my son,” “my wife,” etc., depending on the context in the conversation.

So a natural English translation is:

• “Because (my child / my wife / he / she) makes the pasta and pizza (they) learned in cooking class for the family, it really helps.”

The important point:

• 作ってくれる = “(someone) makes (it for me/us)”
• The “someone” is understood from earlier context, so it’s left out.

What does で do in 料理教室で習った? Could I use に instead?

Here で marks the place where an action happens:

• 料理教室で習った = “(someone) learned (it) at cooking class.”

で is used for:

• Places where actions take place: 学校で勉強する (study at school), 公園で遊ぶ (play in the park)

に with places usually indicates:

• Destination / arrival: 学校に行く (go to school)
• Location of existence: 学校に先生がいる (a teacher is at school)

So 料理教室に習った would be wrong; you need で to show “learned at the cooking class.”

How does 習った work here? Why is it past tense if this sounds like a general habit?