The Prophet (ṣ) informed us that this question comes from the whispering of Satan. As such, when the believer is confronted with this question, he or she should reaffirm their faith in Allah and stop trying to think about it logically because the premise itself is flawed.

Abu Huraira reported: The Messenger of Allah, peace and blessings be upon him, said: يَأْتِي الشَّيْطَانُ أَحَدَكُمْ فَيَقُولَ مَنْ خَلَقَ كَذَا وَكَذَا حَتَّى يَقُولَ لَهُ مَنْ خَلَقَ رَبَّكَ فَإِذَا بَلَغَ ذَلِكَ فَلْيَسْتَعِذْ بِاللَّهِ وَلْيَنْتَهِ;

Satan will come to one of you and he will say, ‘Who created this and that?’ until he says to him, ‘Who created your Lord?’ When it comes to this, let him seek refuge in Allah and stop such thoughts. Source: Ṣaḥīḥ al-Bukhārī 3102, Grade: Muttafaqun Alayhi

In another narration, the Prophet (ṣ) said:

فَلْيَقُلْ آمَنْتُ بِاللَّهِ

Let him say: I have faith in Allah. Source: Ṣaḥīḥ Muslim 134, Grade: Sahih;

The existence of the contingent, dependent, and temporal universe is itself sufficient proof that a necessary being exists who caused it to be. This higher power must be greater than the universe and not dependent upon anything to sustain itself. The Creator is by definition uncreated and thus asking who created the Creator is a logical fallacy of definitions.

Ibn Taymiyyah commented on this tradition, writing:

من المعلوم بالعلم الضروري الفطري لكل مَن سلِمتْ فطرته مِن بني آدم أنه سؤال فاسد وأنه يمتنع أن يكون لخالقِ كلِّ مخلوقٍ خالقٌ فإنه لو كان له خالقٌ لكان مخلوقاً ولم يكن خالقاً لكل مخلوق;

It is known by necessity and human nature, for all who have sound nature among the children of Adam, that the question is invalid. It is not possible for the Creator of the creation to have a creator. If He had a creator, He would be created Himself and would not be the Creator of everything. Source: Dar’ Taʻāruḍ al-’Aql wal-Naql 3/314;