We use: Land O Lakes Salted Butter (unless otherwise specified).
Why Land O Lakes? Because it’s widely available and always consistent, meaning it always contains the same amount of water. Some bargain brands contain more water, and that can wreck your recipes.
Fun facts: The amount of water (or moisture) in butter can make the difference between cookies that hold their shape and those that spread and burn.
Why salted? Salt is a preservative, so salted butter stays fresh longer than unsalted. Added salt is the only difference between salted and unsalted butter.