A cookie does not know your future
Most fortune cookies are printed slips placed in a dessert. Reading one is not automatically the same as consulting a fortune-teller. A cheerful line about travel, success, or a surprise in your week has no authority over your life.
Still, the question changes if someone begins looking to the message for direction, reassurance, or secret knowledge. God told Israel not to pursue practices meant to uncover the future or gain guidance from spiritual sources other than him (Deuteronomy 18:10-12). Christians are called to trust the Lord, not a prediction in a biscuit (Proverbs 3:5-6).
If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.
The issue is where you seek guidance
Everyone wants to know what lies ahead. That longing is human. But Scripture points believers towards God when they need wisdom. James wrote to people facing real trials and told them to ask God, who gives generously (James 1:5).
That may look ordinary rather than dramatic: praying, reading Scripture in context, seeking wise counsel, and taking the next faithful step. God does not promise to answer every question about tomorrow, but he does promise wisdom for those who ask him (James 1:5).
Pay attention to your conscience
Paul dealt with everyday choices that unsettled some Christians in Rome and did not trouble others. His concern was that believers act from faith, not pressure or inner doubt. If you cannot read a fortune cookie with a clear conscience before God, you do not need to read it at all (Romans 14:23).
You also do not need to judge a friend harshly for laughing at a vague cookie message. Yet it is loving to be careful when something could draw a person towards superstition, fear, or dependence on signs. Jesus teaches that the Father knows what his children need, so anxiety does not have to drive us to search for predictions (Matthew 6:31-32).
Trust in the Lord with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths.
A simple way forward
Enjoying a meal and reading a silly message need not become a spiritual problem. You can smile, throw the paper away, and carry on. But don't use it to decide whom to date, whether to take a job, or what God is saying to you.
If you notice that fortune cookies, horoscopes, tarot, or similar things are becoming a source of guidance, step back. Bring your uncertainty honestly to God. He calls his people to seek him, and he is far more trustworthy than any printed prediction (Isaiah 8:19).