Plain, unflavored coffee does not need kosher certification. However, any flavored coffee needs kosher certification since flavors can contain non-kosher ingredients.

Do coffee grounds need a Hechsher?

A: Unflavored roasted coffee beans do not need a hechsher.

Can coffee be not kosher?

In its natural form and during the roasting process, coffee is considered kosher because it only comes into contact with water. When coffee is decaffeinated or flavored, it can transform into a non-kosher food.