So, what can you use instead of Orgeat syrup? Well, one popular option is almond extract. It's not as sweet as Orgeat syrup, but it's got that same nutty flavor. You can mix it with some simple syrup to get a similar consistency.
Another option is amaretto liqueur. It's got a similar almond flavor, and it's already sweet, so you don't need to add any sugar. Just be careful, because it's a lot stronger than Orgeat syrup, so you'll want to use it sparingly.
You can also try using frangelico, which is a hazelnut-flavored liqueur. It's got a similar nutty flavor to Orgeat syrup, and it's pretty versatile. Just remember, it's a bit more expensive than some of the other options.
What are the Best Substitutes for Orgeat Syrup? – Fleur de Sel Gourmet