In the name of Allah, the Most Merciful, the Merciful.

Thank you for your inquiry.

According to the Bokmål Dictionary, ethyl is «a radical of carbohydrate that is included in a number of chemical compounds.» While vanillin is «an aromatic substance with the taste of vanilla.» In other words, ethyl is a pure chemical substance, and vinylin is an aromatic substance found in several plants, including vanilla (see for example Caplex, or Store Norske Leksikon). None of these fall under the substances that are prohibited in Islam as long as they do not have an intoxicating effect.

The conclusion is that it is permissible to consume foods containing ethyl vanillin or vanillin.

And Allah knows best.

Najeeb Naz