Buttermilk

Keep refrigerated and tightly sealed. Separation is normal—shake before using. Freezing may change texture; thaw in fridge and shake well.

Low-fat cultured buttermilk; values vary by brand and fat content

The acidity in buttermilk reacts with baking soda to create lift in baked goods—don't skip it in recipes calling for both

Use buttermilk to tenderize chicken or pork; the acid breaks down proteins for juicier meat

Add a splash to mashed potatoes or soups for extra tang and creaminess

Let buttermilk come to room temperature before baking for better mixing and activation

Biscuits and scones—creates flaky, tender layers

Fried chicken—both as marinade and for coating

Pancakes and waffles—adds tang and helps them rise

Ranch dressing and creamy dips

Cornbread and quick breads

Smoothies—for probiotic tang

Substituting regular milk without adjusting leavening—buttermilk's acidity is essential for baking soda reactions

Using old buttermilk that smells off or has mold; tang is normal, but spoilage is not

Overheating buttermilk in sauces or soups, which can cause curdling—add at the end over low heat