Add a little bit of the flour at a time, making sure to blend well; the mixture will get increasingly thick, so it's easiest to add it slowly to make sure that you don't end up with any unmixed flour pockets. (bubbies.com)
Fold everything together gently just until combined and no flour pockets remain. (eatdrinkshrink.com)
Add wet mixture to dry and mix well until all flour pockets are incorporated into the batter. (wholesomelicious.com)