What is a word for "made more complicated"?

I am looking for a word that means "made more complicated/complex" but not as simple as "complexified", which I don't think is a very popular word.

Example usage:

The inclusion of Shichimi togarashi, a Japanese spice, "complexified" the already intricate mixture of ingredients.

The inclusion of Shichimi togarashi, a Japanese spice, "complicated" by the already intricate mixture of ingredients, intensified the recipe, taste, situation.....

or

The inclusion of Shichimi togarashi, a Japanese spice, "intensified" by the already intricate mixture of ingredients ** further complicated** the recipe, taste, situation, etc.....

or

The inclusion of Shichimi togarashi, a Japanese spice, further complicated the already intricate mixture of ingredients