Hi, thank you for your question!
Introducing new foods can be challenging. Studies show that toddlers may need to be introduced to a new food 5-10 times before liking it. Kids aged 3-4 may need to try it 15 times before developing a taste for it!1 That sure is a lot of times! The most important thing is to be patient and not give up. Continue to introduce new foods but with each meal, be sure to always include at least one food item that you know your child enjoys.
Since food aversions can be more extreme in children with autism, I encourage you to ask your child’s doctor for a referral to see a registered dietitian. A registered dietitian will be able to work with you and your child more closely to answer your questions and to make sure your child is getting the nutrition they need.
I hope this helps!
Maier, Andrea. Chabanet, Claire. Schaalc, Benoist. Issanchoub, Sylvie. Leathwood, Peter. Effects of repeated exposure on acceptance of initially disliked vegetables in 7-month old infants. Food Quality and Preference. Volume 18, Issue 8, December 2007, Pages 1023-1032.