I am making a sushi cake and I need to fill a fondant bowl with soy sauce. How do I make fake soy sauce so that it looks real?

I would use decorating gell mixed with brown and black gell color till I got the right shade. I did this for tea once and it was GREAT!

In a cupcake book they used Hershey's chocolate syrup

gel sound slike a great idea! otherwise i was thinking a very thin glace icing?

how about vanilla extract?

You could also use clear vanilla with dk brown icing color and a drop of black color

Ive used piping gel tinted with gel color to achieve liquid effects.

I would beafraid that vanilla extract would eventually soak into the cake (if you are using cake/fondant/buttercream as a bowl to hold the "soy sauce"

piping gel with food coloring

I just used a soy-sauce colored liquour (see sushi cake in my pics).

I ended up using maple syrup with some brown food dye mixed in. Looked AWESOME! Thanks for your help everyone!!