Weaning off formula?

Hannah • 5 beautiful children 14 angel babies pregnant and shooting for #6: the last one

My son is going to be 11 months next week. I was curious about weaning because my first 3 are much older and I can't really remember weaning lol. I have heard some Mama's say that they add some regular milk in with the formula. Has any other mom done it like this? No bashing please I'm just curious.