Answer:
If I go to a friend's house, I usually <u>make</u> homemade
Explanation:
This sentence is a zero conditional sentence, so the verb of the main clause should be in simple present.
We use the zero conditional when we talk about facts, things that are generally true, actions that generally happens, like habits, and to give an order, a piece of advice or to make a request. When expressing habits or facts, this grammatical mood has the following construction:
"If clause" in simple present + the main clause in simple present.
So, "If I go to a friend's house, I usually make homemade" is a zero conditional sentence because the "if clause" is in the simple present tense and the main clause has the adverb "usually" that indicate us a habit, therefore, the correct conditional verb of the main clause should be "make" (the simple present form of the verb).