add (something) into

add (something) into

To mix or join two or more things together. Make sure you add milk into the brownie mix before putting the pan in the oven. Can we add some more herbs into the sauce? It's pretty bland.
See also: add

add something into something

 and add
(something) in to introduce something into something else. Now, add the eggs into the mixture. Add in some more eggs.
See also: add