Some recipe instructions are frustratingly vague. When it comes to baking, the phrase "be careful not to overmix" is fairly common, but it's not always clear what that means. This rule of thumb will help if you're confused.
The next time you dive into a baking recipe and encounter the "over-mixing" enigma, Nicole Weston at Baking Bites suggests you simply "do the minimum amount of mixing necessary to make a uniform dough." That's it! Just be sure to crape down the sides, make sure there are no streaks of flour left in the mixing bowl.
Unless you're a serious baker or chef, you may have wondered at some point whether pre-heating your oven is actually necessary -- especially when you're in a rush to get food on the table. Well, it is. Here are a couple of reasons why.
What Is Overmixing? [Baking Bites via Food52]