What's "mix in with" mean?

Native speaker’s answer
Rebecca
"Mix in with" means to incorporate and stir into one thing alongside or with another, so it'll be a mixture of two or more things. So here, he's suggesting incorporating his son's medicine with food so that his son doesn't notice the medicine. Ex: Mix in the garlic paste with the tomato sauce. Ex: I mixed in the red paint with the blue paint to make purple.