Short answer: Not so good.
Many companies are manufacturing utensils made from potato starch or corn starch. They are marketed as compostable and biodegradable. But, the problem is these products do not bio-degrade under natural conditions. They need high temperatures and UV light to decompose, which is possible only in composting facilities. Though some of these products may degrade in natural environments but it can easily take them 10-15 years to completely vanish. Plus the compost they make is crap, that’s why composting facilities don’t accepts these. They also produce methane gas which is a hazardous greenhouse gas. So what to do?
Your Best option
Stick to using metallic or clay utensils (Non-Glazed) and wash them after use.
But if you have no choice other than using disposable utensils, well then you have no choice I guess, you can goo for these edible spoons https://www.hindustantimes.com/mumbai-news/ditch-plastic-spoons-5-eco-friendly-alternatives/story-waeW6vFTuP2MCklr7BAQgP.html