That's an ambitious undertaking! I'm impressed. I don't know how much you know about cooking, so forgive me if you already know this, but there are different measuring tools for dry and liquid ingredients. Liquid ingredients are usually measured in something like this
. I also have one of these
for measuring small amounts. I would imagine these would be difficult for someone who is visually impaired, because using them accurately relies on pouring the liquid in until it reaches the appropriate line painted on the outside of the cup. There's also a gap of a half-to-several-inch(es) between the top painted line and the top of the cup. This helps avoid spills, but again might make it harder for a blind person, because they can't just fill the cup to the top and know it's the right amount (which they can do with dry measuring cups).
It might be useful for someone who's visually impaired to have individual liquid measuring cups for each of the common quantities - 1/4 cup, 1/3 cup, 1/2 cup, 1 cup. That way they can fill the cups and know they have the right amount. To make them easier to use, you could keep the margin at the top (to help avoid spills) but have a raised line inside the cup that the person could feel to gauge the correct level of the liquid.
You could also look into a smaller version of this for small liquid measurements - 1/2 tsp, 1 tsp, and 1 tbps would probably be sufficient.
Hope this makes sense! And good luck with your project!